Temperature sensor, defrost heater and fan motor replacement
Before making any change, technician should:
1.Disconnect power to the cabinet
2.Remove screws from venturi and pull down
To change a temperature sensor (cabinet zone sensor or defrost termination sensor), simply disconnect the sensor wires from the controller and replace the new sensor in the original position. Use plastic tie to tighten the zone sensor. Insert the sensor for defrost termination firmly into the evaporator coil, in between the fins. Make sure the sensor wires do not touch or are not close to any heater rods.
To change defrost heater – remove screws from drain pan and pull down – remove screws from coil mounting straps – spring straps open – remove heater shield – pull heater out of slots in coil fins.
To change fan motor – disconnect fan motor leads – remove screws from fan guards and motor mounts.
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