17-08-2021, 07:24 PM
Something that is perhaps not that well known is that if one or more relays are fitted they can send out a voltage spike that can seriously mess up any electronics. The relay should be replaced with one that has a built in diode. A similar problem can occur with electric petrol pumps; in that case a transil or varistor should be wired across the points. Probably not relevant in this case.