Our church has a gas boiler which provides hot water to heat the church. The boiler is only two and a half years old, and had to have a replacement PCB last autumn when the boiler was continually 'locking out'.
We have started to have the same problem again this year when I've tested the system, and wondered if the PCB might be at fault again.
The boiler is mounted on a concrete slab in what was the old oil-fired boiler house, and the building is set below ground level (like many church boiler houses) and is often very damp. Could the damp be the cause of the electronic ignition system failing, or is it likely that the PCB is at fault again ? Or indeed, could the damp be affecting the PCB ?
Would a constantly burning low wattage bulb be part of the answer ? Any comments gratefully received.