Britony combi 80

[wkma]

Hi

first time posting here so bear with me,
i've got a problem with a britony combi 80 whereby the ch pump is constantly running.
does anyone have any thoughts ?

I have replaced the power pcb as i was having to tap the box to get the heating and hw to work and everything is working fine except for the pump running 24/7 (which it was prior to the pcb replacement)
I hope this all makes sense and yes i do know this boiler is a piece of junk !!

cheers

 

[Gasguru]

It might be stuck in DHW mode...disconnect the DHW flowswitch wiring to confirm.