Service Manual

22
2. Evaporator is Frozen Up
Evaporator is Frozen Up - Possible Cause
1.
Evaporator
a)
Dirty.
2.
Evaporator Fan Motor
a)
Defective.
b)
Fan blade binding.
3.
Refrigerant Charge
a)
Low.
4.
Defrost Heater (if applicable)
a)
Defective.
5.
Defrost Timer or Control Module
(if applicable)
a)
Defective.
6.
Defrost Safety Thermostat Open
(if applicable)
a)
Defective.
7.
Thermostatic Expansion Valve
(not adjustable)
a)
Defective.
3. Defrost Fails to Initiate or Terminate
Defrost Fails to Initiate or Terminate - Possible Cause
1.
Defrost Thermistor (if applicable)
a)
Defective.
2.
Defrost Timer or Control Module
(if applicable)
a)
Defective.
3.
Defrost Heater (if applicable)
a)
Defective