Heating, Convector HeatersHeating, Fan HeatersHeating, Oil Filled Radiators Full list. I also have a switch on the return to the boiler which I guess is an overheat switch set a 60. 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. A while after the timer goes off, the boiler boots up again. 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. Mechanical boiler timers explained. Conclusion. heatingforce says: March 5, 2018 at 11:24 am. 1) Malfunctioning Check Valve. heatingforce says: March 5, 2018 at 11:24 am. Ensure you have read our Small If so is it off. Logical as the Timer tells the valve to open, the valve confirms to the boiler it is open / fires it. Place the thermostat face down on a counter, and open the back. Turn off the power again, and remove this from the wall. Heating, Home Heating Systems (31117 other questions). 1) Malfunctioning Check Valve. The only way to stop it is to turn the actual boiler to 'heating off'. It seems to come on at random. Ergo the boiler may need to shut itself off for a short while. 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. I don't know if this will help or not. 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. Should have added that the froststat is potterton prt100 and the boiler a potterton f60 primaF. I went downstairs to check, the rads were cold and the boiler not firing but making its usual humming sound. 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. 11 posts. Reply. Turned it off at the wall and unsure what is wrong( costly?!) At times you might have found yourself questioning as to why my boiler stays on when timer is off. Inside the relay connection, valves allow the flow of gas to and from the boiler. 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. Once it becomes clear that your boiler is heating the house when it isn't necessary, you should turn the thermostat down. One such example of this is an older boiler that continues working even when the thermostat is turned down and the programmer is off. G.keen on 2nd December 2016 at 8:01 am My combi boiler goes off 4to5 minutes of being on. Sometimes it's just a bit of grit stuck in the microswitch and can be cleared. Print page before using information supplied via this website. frost stat is a likely suspect , but do you have a 3 port valve on your system or 2 zone valves? 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. Thanks. 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. Switched off the CH altogether at the timer, but the boiler didn't shut down Hot water was also 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. When we turn the heating off, it stays on for another couple of minutes, then we hear it click off - no problem. I opened up the motorised valve and carefully operated the switch and found that it put the pump off. Update: have tried the on off button at the mains. ), (Enter your name as you wish it to be displayed.). 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. Other users of howtomendit.com provide the answers. 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. Any ideas why its doing this?? Advance – This moves the timer to the next ‘on’ or … Answers. Why is the pump running constantly on a Greenstar CDi boiler? Best Answer . A while later it was back down to 0V. Reply. American Standard Furnace 6 red flashes Code. Advance – This moves the timer to the next ‘on’ or … howtomendit.com costs nothing to use and you can ask a question without an account or logging in. Attempting Ordered a new sun valve as a result, thanks again Philip. A while after the timer goes off, the boiler boots up again. Got an Eco option button on the boiler? You should also check the relay connection, where the control is joined to the side of the boiler. Check for loose wires, and replace the fuse. Hot water from the boiler rises and travels by natural convection up to the radiators. 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. Reply. Switched off the CH altogether at the timer, but the boiler didn't shut down Hot water was also off. But it is not. 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. Hi all, Please someone guide me! I have just had this problem with a Potterton Netaheat 12/22. 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. Best Answer. Including this, there are a number of other problems that can arise with the timer to leave you scratching your head. I don't have the eco button on. The more detail and information you provide in your question the easier it is for others to help you. While each of these are much easier to fix. When it's off the LED flashes and then when it fires up the LED stays on. This is normal, and the length of time depends on the pipework, make of Boiler, and how it was set up, etc. The next area to look is at the programmer. Most manufacturers (Honeywell) see a replacement kit for the internal parts. That depends on the design of the boiler. I have a Worcester Bosch combi boiler controlled by Hive wireless room thermostat. 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. This just happened all of a sudden. 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. 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. Is C50GKWF, it has a small duel cooker? 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. Copyright© Thanks for the welcome. You … When we turn the heating off, it stays on for another couple of minutes, then we hear it click off - no problem. Plumb Services London. Turning a timer off is easy. 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. 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. The boiler has a Honeywell thermostat and relay switch model # R8285D-1026. 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. Click here for Frister & Rossmann repair information. Mechanical boiler timers explained. It has been doing it constantly day + night for the past couple of days. 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. Had same problem with Weil McClain boiler which has a 3-way valve with an actuator. (The boiler fires up and down until the heating reaches the thermostat setting. ... mend, fix, or repair just about anything. This just happened all of a sudden. To mend any household, kitchen, or other electrical appliance start here. BOILER STAYS ON AFTER TIMER ENDS? 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. Basic here - but when you say 2 valve - I have two electric valves - one for the heating and one for hot water. Once it becomes clear that your boiler is heating the house when it isn't necessary, you should turn the thermostat down. This is completely normal, and is there to ensure you have hot water when you turn it on. 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. Does anyone know what is wrong. 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. Just checked and was same issue as last time the valve switch stays on when the valve closes. +1hr/Boost – Your heating will come on for a boost of warmth lasting one hour. I had a plumber change my timer, which still didn't solve the problem. Reply. The boiler is on setting 5 of 7 (67 degrees) and the Hive thermostat is set to 21 degrees. my friendly plumber disconnected the valve that enables or disables flow to the heating but I have since reconnected that one. All information is provided "AS IS." 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. 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! I have a Worcester Bosch combi boiler controlled by Hive wireless room thermostat. 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. It’s literally warming up so it can spring into action when you turn on the tap or heating. 6am-9am) even after the end time the boiler remains on and hot water and central heating are on. All rights reserved. The boiler is on setting 5 of 7 (67 degrees) and the Hive thermostat is set to 21 degrees. 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. Installing two heating 'stats in parallel? Your room thermostat settingstelling the boiler not to come on 5. 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. Last night though I realised around 11 that the boiler hadn't gone off. In fact, half an hour later, they still feel red hot. it switches the boiler off … 1 to 10 of 10. buildersmate. +1hr/Boost – Your heating will come on for a boost of warmth lasting one hour. I don't have the eco button on. (Add your answer here. but will stay on when the heating is on .when it cuts off a letter d appears.what could be the fault. 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. If so is it off. You should also check the temperature of the water. 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). A more serious problem with your boiler Could it be any of these? When power to the valve is disconnected, a spring inside … 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). For example, if you have a 20kW boiler connected to a 15kW radiator load, because the boiler is providing more heat than the radiators can emit, the water would slowly get hotter and hotter until it was actually boiling. Why is the pump running constantly on a Greenstar CDi boiler? 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. 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. Including this, there are a number of other problems that can arise with the timer to leave you scratching your head. The clock resettingdue to the power being out for a while (especially if you have an older boiler) 3. If the two devices don't match, try removing the control switch, and then retesting your boiler. If your boiler's not working, and it's simply low on pressure, you'll be back up and running in no time. Still did n't shut down hot water was also off shut down hot water was also off relay! Until your kit arrives - can obvious... Troubleshooting two-wire thermostat system boiler keeps losing time then you need. Cylinder heats up, i can just hear hot water rushing through the pipes back again... 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To Having a room thermostat settingstelling the boiler it is to turn the is.