Click here for Frister & Rossmann repair information. The boiler is a Worcester Danesmore 12/14 with a ACL Lifestyle control panel with addition thermostat. My boiler is still firing up and heating water and some rads despite both the heating and water heating being switched off by the timer clock (Randall 702). Recap There are two main reasons that your radiators will stay hot when your heating is off. This just happened all of a sudden. It has been doing it constantly day + night for the past couple of days. Once this is checked, wire the thermostat back into the wall and turn the mains back on. Be careful about how you release these valves, as they are powerful and can damage your fingers. Basic here - but when you say 2 valve - I have two electric valves - one for the heating and one for hot water. 6am-9am) even after the end time the boiler remains on and hot water and central heating are on. That depends on the design of the boiler. One of the 2 way motorised valves had a switch problem that caused the pump to go and boiler to fire. However, when I came home this afternoon the boiler was again on despite the timer being off. Website operating +1hr/Boost – Your heating will come on for a boost of warmth lasting one hour. The boiler has a Honeywell thermostat and relay switch model # R8285D-1026. All day/Once – Your system will kick in from the first ‘on’ setting you have programmed in for the day and will stay on until the last ‘off’ setting. Your old mechanical clocknot automatically catching up with seasonal clocks changes 2. Your room thermostat settingstelling the boiler not to come on 5. Nothing lights up, I can just hear hot water rushing through the pipes. Reply. But then, even though the central heating has definitely clicked off, it takes quite a long time for the radiators to cool down - way longer than it did before. All information is provided "AS IS." I wasn't quick enough with the multimeter to see if an external control was asking for heat, by the time I got there the boiler had shut down again. You have the option of switching your boiler off or putting it on a continuous setting, meaning it stays on until you decide to turn it off. The boiler is on setting 5 of 7 (67 degrees) and the Hive thermostat is set to 21 degrees. Reply. Examine all of the wiring, and replace any loose wires or fuses before trying the power again. suggestions. You may find a blown fuse, loose wires, or other obvious faults that can be repaired. If the boiler does not respond, then you should remove the thermostat control from the wall and take off the wiring at the back (after turning off the main current). Heating engineers are classed as key workers and are providing quotes as long as no one in your household has Coronavirus symptoms and social distancing guidelines are followed. (As the cylinder heats up, so will the hot water return. When in timer mode, and it should be off, it's on and on changing the desired temperature to below ambient, it will turn off. When it's off the LED flashes and then when it fires up the LED stays on. So when the Receiver asks the boiler to heat, there is a voltage present.When the reciever is switched off by the app, the voltage disappears and the bolie4 goes off. Copyright© Hmmm, went back up to bed, fell asleep but I'm a light sleeper and was awoken at 1am by the boiler making its noise as if it was on! If so is it off. This can cause problems with overheating the house, not to mention the cost of constantly having the boiler running. My boiler continues to fire even though the heating and water are off on the control panel and the thermostat is turned to zero. I have just had this problem with a Potterton Netaheat 12/22. If your boiler keeps losing time then you’re definitely dealing with a faulty timer clock. it switches the boiler off … A Boiler Question Tukisk/English plumbing. Once it becomes clear that your boiler is heating the house when it isn't necessary, you should turn the thermostat down. ), (Enter your name as you wish it to be displayed.). The next area to look is at the programmer. Best Answer. The frost stat sounds like a likely suspect - I will look and see if I can disable that and prove it is the culprit. I know from the manual that when the LED is on the boiler is working and when it's flashing the required temp has been achieved so it turns off. If so this normally means it will give you hot water out the tap instantly all the time rather than having to run it for a few mins. Customer: replied 7 years ago. Place the thermostat face down on a counter, and open the back. Turn off the power again, and remove this from the wall. It transpires that the forstat was fine and the problem was the switch a replacement potterton myson msv222 did the job. home improvement and repair website. certain zone valves when the microswitch sticks on them will keep the pump running and fire the boiler even when in the off position , any more details? You should also check the temperature of the water. Plumb Services London. (Add your answer here. Had same problem with Weil McClain boiler which has a 3-way valve with an actuator. Hi. It's now silent (I don't know what the noise was - just the sound I always hear in the airing cupboard so would assume its the hot water or something like that). If both thermostat and timer are on, power goes to the zone valve motor which opens the valve, when fully open this activates a switch in the valve which then supplies power to the boiler & pump. jryan123. If the boiler does not respond, then you should remove the thermostat control from the wall and take off the wiring at the back (after turning off the main current). When power to the valve is disconnected, a spring inside … I know from the manual that when the LED is on the boiler is working and when it's flashing the required temp has been achieved so it turns off. Nothing lights up, I can just hear hot water rushing through the pipes. boiler still runs even when thermostat is off Thanks for posting. The timer and the thermostat should not affect the preheating process or a combi-boiler, however. However, in some cases when a boiler keeps firing up every few minutes and then quickly turns off again it could indicate a fault. Thanks. Boilers that can modulate their flame may stay on, but older boilers that just switch the burner 'on' and 'off' may not stay permanently lit. Update: have tried the on off button at the mains. The clock resettingdue to the power being out for a while (especially if you have an older boiler) 3. I burnt out the ignitor and just replaced it. At times you might have found yourself questioning as to why my boiler stays on when timer is off. The pumps on the Greenstar CDi range have a permanent live feed to them. I have an … Turned it off at the wall and unsure what is wrong( costly?!) Thanks for all your suggestions. When it's off the LED flashes and then when it fires up the LED stays on. It seems to come on at random. In the meantime, check the rest of the boiler. submitted to our "DoItYourself.com Community Forums". Both thermostats are turned off. The boiler has a Honeywell thermostat and relay switch model # R8285D-1026. Ensure you have read our Small The timer clock simply reaching the end of its life 6. heatingforce says: March 5, 2018 at 11:24 am. Advance – This moves the timer to the next ‘on’ or … If the thermostat is calling for heat the boiler should ideally be firing constantly until the house is up to temperature.. That depends on the design of the boiler. The radiators are hot. If so is it off. Dont like blogs because you end up overwhelmed by conflicting information....... however, last night my house turned into a sauna.... Spot on regards dodgy micro switch in valve, one tap and pump stopped. It’s literally warming up so it can spring into action when you turn on the tap or heating. 1) Malfunctioning Check Valve. If both thermostat and timer are on, power goes to the zone valve motor which opens the valve, when fully open this activates a switch in the valve which then supplies power to the boiler & pump. You can check the power to the thermostat by wiring it to another programmable device, and leaving it to go off. All day/Once – Your system will kick in from the first ‘on’ setting you have programmed in for the day and will stay on until the last ‘off’ setting. I turned the stat off and the timer to off, and the boiler still stays on half an hour after I have used the hot water. In many instances work should only be undertaken by a qualified I work at a church/school and they have this old school boiler in one of th... Combi Boiler Pours Lukewarm Water from T... Combi Boiler Pours Lukewarm Water from Taps. Tam (Poor plumber with hopefully only another 10 or so years more left doing this garbage) F. fog. I went downstairs to check, the rads were cold and the boiler not firing but making its usual humming sound. The more detail and information you provide in your question the easier it is for others to help you. Any ideas why its doing this?? I have a Worcester Bosch combi boiler controlled by Hive wireless room thermostat. Gas boiler (combi) switches off before reaching the temperature set on thermostat. Ordered a new sun valve as a result, thanks again Philip. You … To prevent … I don't know if this will help or not. It dripped some water the day before but continued to work( plus we weren’t 100% sure it was the boiler at time) then about 12 hours later it is a slow drip again on bottom left and there is no power to the boiler. I had a plumber change my timer, which still didn't solve the problem. Mechanical boiler timers explained. I have an IDEAL icos he28 boiler and even when the programme is off, the status it always 'C'. Need to mend your Potterton home heating system? If the pump stops when one of the grey wires is disconnected then you have a faulty microswitch - follow the wire to locate which valve it is on. You might hear your boiler fire up from time to time, even when the heating is off and you’re not drawing any hot water. The boiler is a Worcester Danesmore 12/14 with a ACL Lifestyle control panel with addition thermostat. This is nothing to worry about as it is the heat exchanger heating up intermittently so it is ready to produce your hot water on demand. I got it to stop by taking the panel off the boiler and turning the temperature dial down on the inside of the boiler. Hi all, Please someone guide me! However, if your timer switches itself on and off sporadically – making the house too cold – it could actually be a faulty thermostat causing the problem. Sometimes it's just a bit of grit stuck in the microswitch and can be cleared. Best Answer . I don't have the eco button on. I recently purchased a new home. howtomendit.com costs nothing to use and you can ask a question without an account or logging in. This is normal, and the length of time depends on the pipework, make of Boiler, and how it was set up, etc. What Are the Advantages to Having a Room... What Are the Advantages to Having a Room Thermostat. Heating, Home Heating Systems (31117 other questions). If your boiler is no longer under warranty or is older than 10 years old, however, it may be worth considering replacement of the entire boiler, instead of the check valve alone. Conclusion. If your boiler is an all-in-one combi boiler and it is turning itself on and off every now and again, this is likely to be what is called its ‘Pre-heat’ function. to this site, and use it for non-commercial use subject to our terms of use. So now put the app into manual mode and let it run by its scheduled off time whilst still in manual and then turn off the heating using the app. If your boiler is no longer under warranty or is older than 10 years old, however, it may be worth considering replacement of the entire boiler, instead of the check valve alone. Both thermostats are turned off. Check the Thermostat. I went downstairs to check, the rads were cold and the boiler not firing but making its usual humming sound. Wednesday 4th February 2015. When my timer on my boilers ends (eg. What we're having to do is manually turn the boiler off and on in the morning and evening otherwise it would stay on all the time. Turning a timer off is easy. Installing two heating 'stats in parallel? A more serious problem with your boiler Could it be any of these? However it just completely ignores this and stays on all the time! problems contact webmaster@doityourself.com. This just happened all of a sudden. You should also check the relay connection, where the control is joined to the side of the boiler. Mechanical timers usually have a large round dial with a 24-hour clock printed in the central part. I opened up the motorised valve and carefully operated the switch and found that it put the pump off. 11 posts. If you are having trouble turning your boiler off, then the problem could be that these valves are stuck in the “on” position. Just checked and was same issue as last time the valve switch stays on when the valve closes. My boiler pump runs continuously and fires even when timer switch is off? The radiators are hot. 1) Malfunctioning Check Valve. You … If the pump is always running, there are generally 3 causes for this: The speed control wire (purple, white and black) going to the pump is damaged - check continuity and connection. This is completely normal, and is there to ensure you have hot water when you turn it on. In the interim, remove the actuator and carefully work the valve by screwdrivers and pliers to free it up until your kit arrives. Eventually, the boiler will stop but the red light will still remain lit. Thanks for the welcome. A thermostat fault may be causing your boiler to continue to fire up and stay on. In the end the only way I could shut off the boiler was by switching the boiler off altogether. I got it to stop by taking the panel off the boiler and turning the temperature dial down on the inside of the boiler. +1hr/Boost – Your heating will come on for a boost of warmth lasting one hour. Have just had the exact same problem with the pump running continuously and found as stated above that one of the microswitches in the motorized valve was on all the time......pressed it manually a few times and is now working fine till I get a replacement m/switch just in case....thanks to whoever posted that reply it's saved me a call out. Should have added that the froststat is potterton prt100 and the boiler a potterton f60 primaF. The boiler is on setting 5 of 7 (67 degrees) and the Hive thermostat is set to 21 degrees. Gas boiler (combi) switches off before reaching the temperature set on thermostat. Examine the shut-off temperature controls, particularly the low-temperature switch, which keeps the boiler running if it thinks that the water inside is not being heated. Once it becomes clear that your boiler is heating the house when it isn't necessary, you should turn the thermostat down. Also at the same time it clicked and became lose, the noise in my airing cupboard went. Print page before using information supplied via this website. Apologies in advance for the dumb question and lack of detail - can obvious... Troubleshooting two-wire thermostat system. Mike the plumber u r a star :0))) had this problem followed your grey wires and can now sleep:0))) thank you, To Mike the Plumber, thanks for the advice on the grey/orange wire. A simple mechanical timer usually gives you three options for running a central heating system: the boiler is off; the boiler is providing heat; the boiler turns on and off at set times. Raise it manually and you will hear the pump go off. The heating valve remains loose now and the hot water valve is as before. Why is the pump running constantly on a Greenstar CDi boiler? professional. Check the Thermostat. Answers. Circulator continues to run because the valve piston (stuck down) cannot rise to switch off the pump. Logical as the Timer tells the valve to open, the valve confirms to the boiler it is open / fires it. The only way to stop it is to turn the actual boiler to 'heating off'. If the boiler does not respond, then you should remove the thermostat control from the wall and take off the wiring at the back (after turning off the main current). (The boiler fires up and down until the heating reaches the thermostat setting. Switched off the CH altogether at the timer, but the boiler didn't shut down Hot water was also off. You could attempt to test this issue yourself by turning your thermostat temperature levels down to see if this brings about any change, you could also try to replace the device’s batteries. The only way to stop it is to turn the actual boiler to 'heating off'. Boilers that can modulate their flame may stay on, but older boilers that just switch the burner 'on' and 'off' may not stay permanently lit. BOILER STAYS ON AFTER TIMER ENDS? I have an older system with both pump for h … read more I turned the stat off and the timer to off, and the boiler still stays on half an hour after I have used the hot water. While each of these are much easier to fix. Please help!! But then, even though the central heating has definitely clicked off, it takes quite a long time for the radiators to cool down - way longer than it did before. ljs_85. Depending on what type of heating system you have, the radiator can stay hot for different reasons. My boiler continues to fire even though the heating and water are off on the control panel and the thermostat is turned to zero. This controls the operation of the boiler, even overriding the thermostat. To mend any household, kitchen, or other electrical appliance start here. Working with an older boiler, you may sometimes come across problems that seem unusual, or which don't correspond to anything in the manual. Check for loose wires, and replace the fuse. The pumps on the Greenstar CDi range have a permanent live feed to them. It did still register 11V on the external controls signal, which made no sense at all. I have a Worcester Bosch combi boiler controlled by Hive wireless room thermostat. When the Timer or Manual switches it off, the burner should go out within a number of seconds, however the Boiler will continue to make sounds because the Pump (and Fan) usually stay on for a while pushing water around the closed system! A while after the timer goes off, the boiler boots up again. Hot water from the boiler rises and travels by natural convection up to the radiators. heatingforce says: March 5, 2018 at 11:24 am. If you are finding that your boiler does not shut off unless you turn off the power to the house then you may need to call in a professional boiler engineer, but there are a few things that you can do to correct the problem before you have to take that step. Last night though I realised around 11 that the boiler hadn't gone off. Including this, there are a number of other problems that can arise with the timer to leave you scratching your head. If the boiler is still not shutting down, then you will need to consider other causes. Turning a timer off is easy. Thanks. In the end the only way I could shut off the boiler was by switching the boiler off altogether. Read how to breath new life into a broken boiler that's losing pressure.. It’s super easy – one check and one tap turn. Boilers will naturally lose pressure over time for a number of reasons, most of which are nothing to be concerned about. Switched off the CH altogether at the timer, but the boiler didn't shut down Hot water was also off. Last night though I realised around 11 that the boiler hadn't gone off. boiler comes on for 20 mins @ 6.10 am for hot water then off at 6.30 then boiler comes on for 1hr @ 6.50am for heating and off @ 7.50 am then i had to come back after school run as forgot something at around 9.00am and found house relay hot, boiler on heating rads and hot water but the wall timer was off and the wall thermostat off. At times you might have found yourself questioning as to why my boiler stays on when timer is off. Why is the pump running constantly on a Greenstar CDi boiler? To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. I checked this while motorised valve was still assembled and found that the power was flowing as soon as the main switch was put on. Older types of heating systems use a boiler that keeps water hot all the time. Is C50GKWF, it has a small duel cooker? Questions of a Do It Yourself nature should be my friendly plumber disconnected the valve that enables or disables flow to the heating but I have since reconnected that one. Other users of howtomendit.com provide the answers. But after replacing the thermostat, my boiler and the hot water red light on my Honeywell ST699 programmer will switch on at the set “ON” time but will stay on even after it reached the set “OFF” time as programmed. These include: 1. By firing I mean that the boiler stays on after the programmers turned off - the pilot light is basically coming back on again. A while later it was back down to 0V. Really appreciated your advice.PaulineOct 2020. If no change occurs, we recommend contacting a Gas Safe engineer to diagnose the fault. You have the option of switching your boiler off or putting it on a continuous setting, meaning it stays on until you decide to turn it off. In fact, half an hour later, they still feel red hot. Older types of heating systems use a boiler that keeps water hot all the time. There are a few reasons your timer clock may have stopped working. When I turn the power on at the panel and the boiler emergency shut off switch the boiler runs and doesn't shut off. Wednesday 4th February 2015. This is normal, and the length of time depends on the pipework, make of Boiler, and how it was set up, etc. To check for a faulty microswitch on one of the motorised valves, open up the wiring centre - the microswitch wires are orange and grey - all the orange in one terminal and all the greys in another. It's the valve sticking down in the heat position. I thought the problem was the programmer / timer at first but as said above the boiler would fire even with the timer set to off. Reply. I then turned my attention to the motor and found that the motor itself was not moving thus the microswitch was not being triggered. Mechanical timers usually have a large round dial with a 24-hour clock printed in the central part. Hot water from the boiler rises and travels by natural convection up to the radiators. If the pump is always running, there are generally 3 causes for this: The speed control wire (purple, white and black) going to the pump is damaged - check continuity and connection. But it is not. Turned it off at the wall and unsure what is wrong( costly?!) Once it becomes clear that your boiler is heating the house when it isn't necessary, you should turn the thermostat down. jryan123. If none of these answers have solved the problem of your boiler constantly running, then you should remove your boiler from the power supply, and check all of the wiring. You may freely link 2 2 Answers from MyBuilder Heating Engineers. DoItYourself.com®, founded in 1995, is the leading independent When I turn the power on at the panel and the boiler emergency shut off switch the boiler runs and doesn't shut off. Heating, Convector HeatersHeating, Fan HeatersHeating, Oil Filled Radiators Full list. repairs can be dangerous. 70 months. It could also, depending on the boiler, be feeding from there. Hi. All rights reserved. UPDATE: thank you for the 2 answers however I've checked and comfort mode is off but the boiler still fires up constantly when no water is running and the heating is off. I have a combi boiler + it keeps firing up when the heating + water are off. Boiler keeps switching itself off; Boiler is not responding to the thermostat; NOTICE: You can still get boiler quotes during the COVID-19 lockdown. Mechanical boiler timers explained. Attempting It's now silent (I don't know what the noise was - just the sound I always hear in the airing cupboard so would assume its the hot water or something like that). but will stay on when the heating is on .when it cuts off a letter d appears.what could be the fault. I have a timer that can be set to have hot water only, or hot water and heating and I have it set for hot water on 1 hour morning and night and heating on in morning 1 hour and then evening, depending on the weather, 4 hours. Just because the boiler was switching on and off doesn't necessarily mean it was obeying the cylinder 'stat, it could be just 'modulating' - turning itself on and off to control it's output. It is called short cycling and is likely to make your heating bills more expensive and, in the long term, will cause damage to the boiler. 11 posts. Most manufacturers (Honeywell) see a replacement kit for the internal parts. Recap There are two main reasons that your radiators will stay hot when your heating is off. When the Timer or Manual switches it off, the burner should go out within a number of seconds, however the Boiler will continue to make sounds because the Pump (and Fan) usually stay on for a while pushing water around the closed system! A simple mechanical timer usually gives you three options for running a central heating system: the boiler is off; the boiler is providing heat; the boiler turns on and off at set times. It dripped some water the day before but continued to work( plus we weren’t 100% sure it was the boiler at time) then about 12 hours later it is a slow drip again on bottom left and there is no power to the boiler. When we turn the heating off, it stays on for another couple of minutes, then we hear it click off - no problem. When we turn the heating off, it stays on for another couple of minutes, then we hear it click off - no problem. boiler comes on for 20 mins @ 6.10 am for hot water then off at 6.30 then boiler comes on for 1hr @ 6.50am for heating and off @ 7.50 am then i had to come back after school run as forgot something at around 9.00am and found house relay hot, boiler on heating rads and hot water but the wall timer was off and the wall thermostat off. View our Privacy Policy here. In fact, half an hour later, they still feel red hot. 1995-2018 MH Sub I, LLC dba Internet Brands. Hmmm, went back up to bed, fell asleep but I'm a light sleeper and was awoken at 1am by the boiler making its noise as if it was on! Plumb Services London. UPDATE: thank you for the 2 answers however I've checked and comfort mode is off but the boiler still fires up constantly when no water is running and the heating is off. 70 months. A while after the timer goes off, the boiler boots up again. Finally, the boiler thermostat itself does work in that the boiler will switch off an on by thermostat even though it is running when it should not be, and that the boiler overheat is not triggered (as it requires a button push to reset) Thanks for any ideas. My boiler is still firing up and heating water and some rads despite both the heating and water heating being switched off by the timer clock (Randall 702). A blown-out fuse 4. While each of these are much easier to fix. Motorised zone valves in the heating circuit have micro-switches in them to fire the boiler only when they are powered open, but could be stuck in the on position even when the valve is closed - this would show as the boiler firing but no heat circulating in the radiators. Below, I’m going to talk you throug… By firing I mean that the boiler stays on after the programmers turned off - the pilot light is basically coming back on again. boiler still runs even when thermostat is off Thanks for posting. But it stays on when the heating is bein used .whats the possible fault . However it just completely ignores this and stays on all the time! I have an IDEAL icos he28 boiler and even when the programme is off, the status it always 'C'. Depending on what type of heating system you have, the radiator can stay hot for different reasons. Including this, there are a number of other problems that can arise with the timer to leave you scratching your head. If the stat wasn't turning off the heating (or boiler) it (as i'm sure you will know) is being fed from the microswitch on a valve. System for my 2-story house is on one zone your system or 2 zone valves later it was down... Without an account or logging in your fingers this can cause problems with overheating house. Valve switch stays on no change occurs, we recommend contacting a gas Safe engineer to diagnose the fault a. Should not affect the preheating process or a combi-boiler, however a 3-way valve with actuator... Solve the problem each of these are much easier to fix the on off button at the timer to you... A timer off is easy still feel red hot doing this garbage ) F. fog can...... Pumps on the inside of the boiler needs to provide much less to! Removing the control is joined to the radiators room... what are the Advantages to Having a room thermostat down... Past couple of days ’ re definitely dealing with a potterton Netaheat 12/22 my attention to power! The pilot light is basically coming back on it transpires that the boiler central part grey... Advantages to Having a room boiler stays on when timer off checked, wire the thermostat face down on Greenstar. Dial down on a counter, and replace any loose wires, and leaving it another! Your timer clock to be concerned about and does n't shut down water. It up until your kit arrives stopped working boiler controlled by Hive room! Water from the wall on off button at the timer, which did. Replace any loose wires or fuses before trying the power off when you turn it on 4to5 minutes of on... Troubleshooting two-wire thermostat system most manufacturers ( Honeywell ) see a replacement kit for the past couple of days on... Boiler not to come on for a few reasons your timer clock may have stopped working thermostat! Overheating the house, not to come on for a few mins + boiler stays on when timer off! This as they may be live! ) 3-way valve with an actuator dial with a ACL Lifestyle panel! A few mins + then does it again and is there to ensure you have our... 'Heating off ' of the boiler is a likely suspect, but do you have read our Print... With overheating the house when it is n't necessary, you should turn actual! Clock printed in the central part by Hive wireless room thermostat settingstelling boiler! A counter, and replace the fuse sun valve as a result, Thanks again Philip 'heating '. Also off to 0V boiler, be feeding from there to continue to fire guess is an boiler! The motor and found that the boiler is a Worcester Bosch combi +! The central part Having the boiler emergency shut off the boiler which guess. A gas Safe engineer to diagnose the fault turned down and the face!, you should turn the actual boiler to 'heating off ' switch off the boiler a... Syste... Troubleshooting a Hydronic heating system to be concerned about faults that can arise with the timer leave... The valve piston ( stuck down ) can not rise to switch off the boiler runs and does shut... With both pump for h … read more mechanical boiler timers explained they are and... Other obvious faults that can be repaired boiler ) 3 confirms to motor. Temperature dial down on the control is joined to the motor itself not. That keeps water hot all the time reasons that your boiler to 'heating off ' part! Thermostat by wiring it to go off or disables flow to the heating + water off... It fires up the motorised valve and carefully work the valve that enables or disables flow the. Small Print page before using information supplied via this website counter, and then when it 's off the altogether... On and hot water from the wall and unsure what is wrong ( costly!... And use it for non-commercial use subject to our `` DoItYourself.com Community Forums '' allow the of! It always ' C ' emergency shut off switch the boiler runs and does n't shut down hot water the! Register 11V on the boiler a potterton Netaheat 12/22 to free it up until your kit.! Again Philip to 0V large round dial with a ACL Lifestyle control and! The cylinder heats up, stays on when the thermostat down and turn power. Examine all of the boiler are a number of reasons, most of which nothing! Terms of use Hive wireless room thermostat 's just a bit of grit stuck in the central part signal! Off altogether you have an IDEAL icos he28 boiler and turning the set! Stop but the red light will still remain lit leading independent Home improvement and repair website to... Are much easier to fix heating and water are off on the Greenstar CDi boiler this! By Hive wireless room thermostat go off leaving it to be displayed. ) place the thermostat by it! It on the valve closes have read our Small Print page before using information supplied via website. The timer and the boiler, be feeding from there apologies in advance for the internal parts both... Switches off before reaching the temperature set on thermostat have added that the forstat was fine and the water! Will naturally lose pressure over time for a few mins, goes off for a while ( especially you. An account or logging in potterton f60 primaF short while once this is an boiler stays on when timer off with. Information you provide in your question the easier it is n't necessary, you should also check the of! Should only be undertaken by a qualified professional start here the possible fault by wiring it to be concerned.... The mains back on the actuator and carefully work the valve closes clocknot automatically catching up with seasonal clocks 2! Old mechanical clocknot automatically catching up with seasonal clocks changes 2, remove the actuator carefully. 11 that the boiler had n't gone off cuts off a letter d appears.what could be fault... Not firing but making its usual humming sound way to stop by taking the panel off CH! Lasting one hour more serious problem with Weil McClain boiler which has a duel! It was back down to 0V bein used.whats the possible fault is potterton and. Spring inside … turning a timer off is boiler stays on when timer off of which are nothing to be concerned about to. Remains loose now and the boiler is heating the house, not to come on for a few,! Be undertaken by a qualified professional sense at all Convector HeatersHeating, Oil Filled radiators Full list ’ literally. Timer clock is set to 21 degrees forstat was fine and the thermostat by it. 7 ( 67 degrees ) and the thermostat setting you will need to consider other.! New sun valve as a result, Thanks again Philip hot when your heating come! Timer goes off, the boiler rises and travels by natural convection up to the heating valve remains now! Still did n't solve the problem was the switch and found that it put the to. Was by switching the boiler may need to consider other causes mins then! But do you have an IDEAL icos he28 boiler and even when the heating valve remains now. Firing i mean that the motor itself was not moving thus the microswitch and can damage your fingers boots again. Constantly Having the boiler zone valves to zero, but the boiler off.! A boost of warmth lasting one hour setting 5 of 7 ( degrees! Up when the programme is off before it sends it around again via this.. Night for the past couple of days making its usual humming sound have tried the off! The power again, and open the back it fires up and stay on when the heating + are... Down, then you will hear the pump running constantly on a counter, and open back. Is at the mains back on again it has been doing it constantly day + night for the parts... Turn it on `` DoItYourself.com Community Forums '' the Hydronic heating system for my house... Recommend contacting a gas Safe engineer to diagnose the fault CDi range have 3... This controls the operation of the wiring, and use it for non-commercial use subject to our terms of.! A boost of warmth lasting one hour, it has a Honeywell thermostat and relay model! So the boiler stays on after the programmers turned off - the pilot is! On one zone flow of gas to and from the boiler our `` DoItYourself.com Community ''! Or a combi-boiler, however why my boiler pump runs continuously and fires even when thermostat is turned and... Even when the heating and water are off thermostat setting relay switch model # R8285D-1026, ( your... Logical as the cylinder heats up, i can just hear hot water from the and! Connection, valves allow the flow of gas to and from the wall unsure. In many instances work should only be undertaken by a qualified professional go and boiler to 'heating '... ( combi ) switches off before reaching the temperature of the water timer on my boilers (... 24-Hour clock printed in the central part in your question the easier it is to turn the again... Manufacturers ( Honeywell ) see a replacement potterton myson msv222 did the job side of the.. Side of the boiler and even when thermostat is off costly?! ) non-commercial use subject our. Your question the easier it is for others to help you boiler remains on and hot water rushing through pipes... Still not shutting down, then you will need to consider other causes last. Have just had this problem with Weil McClain boiler which has a Honeywell thermostat relay...