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Hi, i had the same problem on my potterton puma, it was caused by the CH temp sensor leaking onto the pump the pump terminals tracking to earth, thus causing an over current demand on the pcb board and causing the PCB to overheat. if your up to it a quick test i did was connect the pump to an...

Thanks Big burner, i'm making the asumption the pressure relife valve is required to be tested anualy ?

Could any one help with this one, 1) im changing my CH system to a sealed/unvented system from a conventional tank system. could someone post me a drawing/schematic of a sealed system denoting pressure valves/pumps/boiler/rads etc 2) im also changing my HW system to a sealed/unvented...

Dear All, Does any one know where i can buy a coil for the gas solinoid, for my glowworm 70b (or potterton Puma 80e, its the same solenoid coil), it is part of the gas control valve, and is the smaller of the two solenods, it has two long screws clamping it to the rest of the solinoid unit...