A
Aqua Tech
Changed and old boiler for the above today. Wired in the power as I would normally (as the old was) but wouldn't kick off. Has power, fan runs for a cpl of seconds, and then nothing! Says about having a seperate cable to the pump with a switched live into the box. Had my spark mate pop over and he just linked the switched live and the the pump live part in the boiler (St2). Says this is fine apart from the fact that the boiler only comes on when called for and not on constantly. BUT, it didnt kick in again. Now sounds like the pcb gone in the new boiler. Have never coma across needing a cable from the boiler to the pump. Is it deffers needed? Or do we think it's pcb?