I fitted a VT9 stat to a Zannussi fridge freezer Mod – ZX56/4W
after about 1 month the customer complained that the fridge was warm, freezer very cold and the compressor running non stop.
Asked customer to defrost freezer and then retry.
2 weeks later customer rang back with same fault.
I have checked the defrost timer, elements all work ok.
Should I look at fitting a different stat or an adjustable defrost timer?
Any advice gratefully recieved.