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Hi all I've have an intermittent fault with my alpha cb28 boiler. The boiler can be working fine all day then the next day there is this problem,for example,when hw or ch call it will fire up for 10 sec and then stop and the yellow light flashes repeatedly for 10 secs and then the cycle...

Hi all I have a potterton prima f30 and its has started to not light first time. It trys to light then stops then 4 sec trys again Once it’s lit it runs no problem I am an electrician and I have replaced the PCB a few years back and the air flow sensor. I think it’s the board again but I was...

Hi all I have a problem with a test I have done today. 17th duel board MK PME system 100A 1361/ ZE 0.10 Rcds trip at ½ rated ive removed all load from rcds, straight on the tails no bonding cpc or cpc of any circuits, only the live natural and earth from the electricity board and it still...