if the motor is running constantly,then it is most likely the system has lost its charge,and I agree with ck. if the motor is running intermittently or not at all you could try replacing the evap timer/stuck in defrost mode,I read your previous posting yesterday and yours is a 07 model so it will require kit B timer.available from espares £12.00.onlyfour wires to connect.the evap timer is on the left hand side of the motor/compressor in a pvc jacket.iam interested in what advice your £17 got you.fully defrost 24 hours,replace stat/pcb/defrost timer.,or simply call an engineer in?.
sub zero, November 2011