I
ian999
😕hi all. i have a problem with a bosch worcester si II boiler.this is the second fault within twelve months, the last being a fan replacement.whats happening is that the fault light flashes at 8 flashes/sec and then when the reset button is pressed moves to 1 flash/sec. the rest of the boiler components are around six years old. on inspection the transformer that plugs into the pcb "buzzes", is this normal ?? and is there any way of testing that the pcb is ok or faulty.also i understand it could be the gas valve or indeed again the fan,which occasionally on reset does turn. any help would be much appreciated .thanks ian.😕
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