Hotpoint Washer Tripping - Door Switch?

I have advice on washing machine fusing or tripping electrics which includes a list of the most common causes but as I mention in the article I don't think it's a fault to tackle without a proper insulation test meter.

Every washing machine has a heater, and some have a system where power runs to most components straight away and they are switch on using the neutral side so it's possible a low insulation on a heater can trip the electrics even when it isn't in use.

Door interlocks aren't particularly expensive or difficult to replace but without door interlock powered up there's no power running through the rest of the machine so it's possible it's just sending power elsewhere and shorting out there. Therefore you can't assume it's the door interlock - although they can cause this problem. Without an insulation test meter you can only guess-swap parts, which is often a blind alley for DIYers.