My heating is playing up,I have a drayton tempus6 timer. When the timer kicks in to heat the water the boiler fires up fine,but when it's time for the central heating to come on the boiler doesn't fire up. Could this be a fault with the timer. Many thanks.
All work to be done by licensed professional. WE KEEP GOING UNTIL YOU HAVE THE INFORMATION YOU NEED, I come and go. This is step ONE.Hello, welcome to JustAnswer. I will stay with you on this until figure out whats wrong.Tell me if you have domestic hot water, and if the boiler keeps it hot for as long as you have a hot water tap on.I need the brand and model number on the boiler later, see if you can find that for me.Thanks!Phil
Hot water is fine,just when it's time for heating to come on the boiler doesn't fire up. Boiler is a thorn emi Olympic 2035b
Thanks!90% of the time the cause for that is air trapped in the radiators. Tell me if you know how to bleed the radiators or not. If not tell me in detail what type you have, to they stand up 3 to 4' tall, made of cast iron or they some other type.We keep working on this until we get the problem solved.Here are bunch of pictures showing various radiator air bleeds, some requiring keys you by at the hardware store.https://www.google.com/search?tbm=isch&hl=en&source=hp&biw=1024&bih=509&q=Radiator+air+bleed+key&gbv=2&oq=Radiator+air+bleed+key&aq=f&aqi=&aql=&gs_l=img.3...1256.11488.0.12184.108.40.206.220.127.116.11.1447.7j7.14.0...0.0.2LaUyIp0ZXYscroll down a bit and you will see a few pictures of the radiators being bled.Bleed only until a *tiny squirt of water comes. Make sure the water pressure gage on the boiler is above 1 bar, or 15 psig.We can go from there as necessary, Phil
Rads are fine, the boiler is not firing up when it's time for heating to come on,also central heating pump was replaced a couple of years ago
Hello again,The way that system works is that when the central heat is called for the water pump must come on, and it circulates the water though the radiators and trips a *flow switch... The pump is good because we know the system is producing hot water. In heating mode however the water flow is switched though the radiators... if there is no water flow there, the flow switch will not operate.The flow switch must operate in order for gas valve to come on.There are several possible causes for no flow in the radiators:- The room thermostat that controls the water valves that admit hot water to the radiators is defective... we can check that- The water valves that the thermostat operates are defective.- The control power to the thermostats/ water valves is interupted because of bad control transformer. or blown fuse.- The water pump is not working- There is air in the radiators- There is low water pressure in the central heat system. (there is a gage on the boiler that indicates the water pressure.)- The change over valve from Central Heat to Domestic hot water is stuck in the DHW mode.If we look into each of those in the proper sequence, we can discover whats causing the problem most quickly and with the least effort.I need to know what the water pressure gage reads on the the boiler as mentioned earlier.And it need to know the details of how you bled the radiators...those are by far and away the things we need to double verify first.Next, if needed we will check for voltage at the hot water control valves, if there is none there... thats the problem. We will have to look into the electronic controls... you will need a multi meter for that.Let me know about the water pressure gage for now, and how you bled the system of air.We can go from there.Phil
There is no pressure guage,bleed rads with key until water comes out.
Thanks. Its going to be difficult to check out lacking a pressure gage, that should have been fit with the boiler. I will opt out so that your question will come up to the rest of our boiler engineers here.Phil
Hi my name is XXXXX XXXXX lets see if we can get you sorted in the shortest possible time. Do you have a cylinder?
Thanks, XXXXX XXXXX said iv got hot water but no heating,yes unit as got a tank, also just tried a new timer with no joy.
If you have a cylinder then you should have a motorised valve in the airing cupboard - it will be a white or silver box with 3 pipes coming out of it. Can you confirm this?
It's been fixed thanks
Domestic Gas, Commercial Gas, LPG, Unvented Hot Water, Part P Electrical, Commercial Catering