Heating coming on with hot water Worcester 24i rsf

[Alexx89]

Great thanks, and the PCB is what controls that? Was hoping it would be something simple like a switch.. Maybe the PCB has been put in wrong from the start.

 

[ianmcd]

the fault you have is most commonly the PCB but your boiler does have a HW flow switch which tells the boiler to stop the pump while CH is also running , but if you switch the CH to off then open a HW tap and the boiler fires then the switch is OK, if the boiler doesnt fire then likely to be the switch

 

[Alexx89]

Thanks! Yeah boiler fires fine when you turn on a hot tap

 

[ianmcd]

Then most probably a relay sticking on the PCB quite a common fault with that boiler

 

[Alexx89]

Does that mean a whole new PCB? Was new less than a year ago

 

[ianmcd]

If less than a year old it might have a warranty on it where did you buy it from ?

 

[Alexx89]

Yeah that's what I was thinking, my mams getting in touch with the guy who put it in.. Not Impressed with his work though 2 screws were rounded off so he's either used the wrong sized bit of went OTT with the drill bit.