Central heating on all the time!

Combi-boiler-turn hot water tap on/off and the heating stops for ...

singletrackworld.com/.../combi-boiler-turn-hot-water-tap-onoff-and-the-...

Combi-boiler-turn hot water tap on/off and the heating stops for 20secs ... hot watertakes priority over central heating so when you run the hot tap, heating is ... Yeah onmy worcester combi there is a diverter valve - it feeds either the heating or ...

My central heating works but I have no hot water - 24'7 ...

https://www.247homerescue.co.uk/my-central-heating-works-but-i-have-...

Diverter valves switch heat between the hot water and the central heating. When youturn your hot tap on, the diverter valve temporarily shuts off the water supply ...

Does your boiler keep switching itself off? Here's why ...

www.dhs-uk.com/does-your-boiler-keep-switching-itself-off-heres-why/

Jul 7, 2015 - ... Bathroom Suites, - Showers, - Wet Rooms, - Taps and Accessories, Information and ... Low water pressure can cause your boiler to turn itself off. ... boiler is not turning off, you aren't getting the amount of hot water you require. ... If there is air in your central heating system, then your boiler may shut down.

Is your central heating unit a heatpump w/ electric heat or natural /propane gas ? And what is the water heater, gas or electric ?

you should have a programmer that will let you have the hot water and heating on or off . You could have a motor rised valve on the system which controls both . depends on what system you have . Fully pumped of just pumped on the heating side .

The flame rod could use cleaning with some steel wool. The other thing is the pressure switch on the inducer might not register the air flow.

over heat limit stat on central heating circuit ? if hot water is ok and hot to temp when run for 5 minutes the expansion vessel is doing its job.remember hot water is the maximum demand for any boiler ,,heating is secondry?once you establish hot water at maximum rate then the only real problem is on you demand for heating??

What kind of water heater do you have?
In any case, it sound like a plumber should check out system.

Do you have indirect heater that gets heat from central heating boiler?
Most indirect/boiler combo heaters have control that is set to heat the water first.
If water is not getting heated, then the control needs repair.

Do you have gas water heater with gas central heating?
The central heater may be drawing so much gas from meter, that other gas appliances are unable to function. larger gas meter or gas line may be needed.
Or if furnace and water heater vent on same chimney, the backflow from central heat could be affecting burner on water heater especially if water heater has electronic sensor that stop combustion if air quality is bad. Venting problems can lead to CO poisoning, and are a serious matter.

the boiler should modulate to controll the radiator temperature but the central heating will go off whilst you are drawing hot water

these furnaces have a sequence of operation , 1 thermostats calls for heat,2 purge fan checks flue is open and not clogged ,3 checks to see if hot plate ignitor or spark ignitor is on 4opens gas valve 5 checks for flame and allows valve to stay open 6 checks for temperature rise and brings on fan , if any of the process is not there or interrupted trys 3 times and defaults to lockout , that is the best answer with out knowing what type you have , hope i helped

u need to have a key (its like a T shape key) and u put that under the boiler its a hole in there, than u open the tap which is near this hole.

I have a Siemens "Radio" Room Stat - the receiver has switched itself off. How do I restart it. I have pressed the restart button and the reset - nothing happens except for red light flashing and then off. I do not have the instructions. Where might I get them?
J W-K