Re: Zanussi ZWF 1437S machine
The door switches do get warm as they have a small piezo heater inside; but if it is very hot, you would be advised to change it. Door interlocks on Zanussi machines are famous for blowing the PCBs…….. 😉 Click the Shop @ link in the left banner and they will find you the right part.
To remove the gasket retainer, look under the door gasket and you will see a gator type clip arrangement. Use a small instrument screwdriver to gently prise them apart and it should come off easily. Replacement is a reversal of removal, but clamp the gator clip tight using pipe grips or similar. Take care not to slip!!
Hope that helps,
Steve.