If the heating is to come on alone then a 3 port valve needs fitting in the airing cupboard, a wire to the cylinder thermostat and a wire to a room thermostat, a wire to the programmer and a mains power cable.
If you are happy to have the hot water on with the heating then it is up to you - it does not make any difference to the boiler control
It is the programmer currently that turns on the pump and the boiler and possibly opens a valve in the airing cupboard
The clicking of the boiler could just be a clicking relay on the PCB - is it causing a problem?
Thanks for that, Andrew - I am tempted to leave well alone. Think we have correct 3 port valve in a. cupboard, just think it has not been wired up enough.
However, what do you think could be causing the constant on/off clicking noise in boiler ? Wd a faulty pcb cause that problem ?
A faulty relay could, but is it turning the boiler on and off or just clicking?
Think it's just constant, fast clicking when water alone switched on, water still seems to heat up.
If the ignition is not clicking on and off all the time then there is no stress on the boiler
It may just be a noisy gas valve and it is modulating between high and low flame to keep the temperature constant
OK, will check again with plumber, only happens (I think) when water is up to temp, so you are probably right. When water temp in airing cupba
OK, think ure right. Clicking only happens (I think) when water is up to temp. No clicking when water temp on cylinder stat turned up to very high. so I can probably leave well alone ?
I wouldn't worry or waste my money
Just bear this mind and mention it again if the boiler fails to heat water or has a problem controlling temperature to what is set on the boiler
OK, huge, hugethanks for your help, Andrew, I am very grateful.
Come back again if you need me.
Will do, thanks. Have a good day.