
Section 7Diagnostics
7-2
Symptom Possible Cause Corrective Action
Cabinet does not
maintain proper
temperature
Temperature control problem
• Control setting is incorrect
• Control is defective
• Set the control to the
desired setting
• Check the control, replace if
defective
Condenser coil is dirty Clean the condenser
(Refrigerators Only)
(Refrigerators Only)
(Freezers Only)
(Freezers Only)
Evaporator coil is frozen
• Air flow is restricted
• Refrigerant charge is low
• Vacuum relief is leaking
• Evaporator drain line is not
trapped/no water in trap
• Evaporator fan motor is not
running
• Door is open/gasket is not
sealing properly
• Cap tube is incorrectly
positioned
• Cap tube is restricted
• Insufficient number of defrost
settings
• Calrod defrost heater is not
energizing
• Arrange product for proper
interior air flow, check the
evaporator coil for debris
• Find and repair any leaks,
replace the drier, evacuate
and recharge the system
• Check for leaks, repair or
replace as necessary
• Check the trap
• Check:
• fan motor
• light/fan switch
• automatic defrost time
clock (freezers only)
• defrost end/fan delay
thermostat (freezers only)
• Close door, repair or replace
gasket as necessary
• Reposition the cap tube
• Check the tube, repair or
replace as necessary
• Defrost the evaporator coil,
then add another defrost
cycle pin to the automatic
defrost time clock
• Check the automatic
defrost and the calrod
heater
Refrigeration problem Refer to Refrigeration
Specifications on page 6-5
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