Re: Electrolux ER7926/1B Prod No. 925888655-01
Hi Alan,
Most of the times it just happens by itself.sometimes they leave the door open for longer period i.e. while putting food in the freezer etc so it builds up with the ice.
I think the best thing is always ask the customer to defrost it manually(by switching it off for 24hrs)and then swith it back on.If the problem presists then investigate further.
I am not sure about this model but most Zanussi/Electroulx F/F come with a cutout sensor that needs replacing in case it goes.It has a sensor that is attached to the coil and then one of its wire has a small builtin fuse.
Testing the heater is like any heater just check for the resistance.
And lastly if there is a mechanical defrost timer then just turn it manually and see if the heater comes on,if it does not then the defrost time is gone.
Hope it all makes sense.
Regards
Omar