R
Reece1978
My boiler is 5 years and 1 month old and just developed this fault. If i run the hot tap and turn the boiler on it runs hot but then registers the fault after the water is turned off again and wont run again untill i turn the power off and on again. The fan seems fine and runs whilst it is heating the water. Do assume this is a PCB fault? can anyone suggest anything else before i fork out for a new PCB please.