KitchenAid KSSC36FKB00, Technical Education

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6-3
TROUBLESHOOTING CHART
PROBLEM POSSIBLE CAUSE TEST PROCEDURE-ACTION
No DC control voltage from main
PCB to the inverter board.
See "Component Testing" section for main PCB test procedure.
Control voltage wires loose or
reversed.
Check connections and repair as needed.
Compressor. See "Component Testing" section for compressor/inverter test procedure.
Inverter board. See "Component Testing" section for compressor/inverter test procedure.
Refrigerator control set too
warm.
Set to a lower temperature.
Refrigerator thermistor.
Check wires and connectors. Run diagnostics and if a defective thermistor is
indicated, confirm with ohms test. See "Component Testing".
Air door stuck closed or
inoperative. Look for ice or other blockage in air door. Run diagnostics test to operate air
door.
Evaporator fan motor not
running.
Run diagnostics test to operate the evaporator fan motor. Check for a
blocked fan blade and repair as necessary. Check for 5-17vdc from pin P7-9
to P7-10. If voltage is correct, replace the motor.
Blocked air flow. Check air door outlet and air returns for blockage.
Warm freezer compartment. See "Freezer compartment too warm."
Refrigerator control set too cold. Set to a higher temperature.
Refrigerator thermistor.
Check wires and connectors. Run diagnostics and if a defective thermistor is
indicated, confirm with ohms test. See "Component Testing".
Air door stuck open or
inoperative.
Look for ice or other blockage in air door. Run diagnostics test to operate air
door. Check for proper DC input voltage. If voltage is normal and door will
still not operate, replace air door.
Air door seal missing or damaged. Repair or replace seal.
Main PC board. Run diagnostics test to operate air door.
Freezer control set too warm. Set to a lower temperature.
Freezer thermistor.
Check wires and connectors. Run diagnostics and if a defective thermistor is
indicated, confirm with ohms test. See "Component Testing".
Evaporator fan motor not
running.
Run diagnostics test to operate the evaporator fan motor. Check for a
blocked fan blade and repair as necessary. Check for 5-17vdc from pin P7-9
to P7-10. If voltage is correct, replace the motor.
Condenser fan motor not running.
Check for a blocked fan blade and repair as necessary. See "Component
Testing" section for condenser fan motor test procedure.
Frost blocking evaporator.
Run diagnostics test to operate defrost system. Test defrost heater and bi-
metal.
Freezer control set too cold. Set to a higher temperature.
Refrigerator operating in the
Max Cool or Automatic Max Ice
Mode (see page 3-5).
Normal operation.
Freezer thermistor.
Check wires and connectors. Run diagnostics and if a defective thermistor is
indicated, confirm with ohms test. See "Component Testing".
No evaporator fan motor
feedback.
The fan motor will run at 3000 rpm.
Main control board is over
temperature.
Look for blocked condenser air flow or inoperative condenser fan motor.
Refrigerator over 48
°
F or
freezer over 15
°
F for 3 hours.
Run diagnostics and test operation of all components.
Both thermistors failed. Run diagnostics and test thermistors and thermistor leads.
No feedback from evaporator fan
motor.
Run diagnostics and test fan motor and/or wiring.
Refrigerator runs
too long.
Normal.
It is designed for this refrigerator to run almost constantly at the lowest
possible compressor speed. Starting and stopping the compressor uses
more power than continuous low rpm operation. Instruct customer.
Unit is set for Holiday Mode. Press the Holiday Mode key to cancel operation.
Either door open for over 10
minutes.
Close door and/or check door switches.
No temperature display,
no interior lights.
"Call Service" icon lights
and/or alarm is activated.
Condenser fan runs
but the compressor
will not start.
Freezer
compartment
too warm.
Freezer
compartment
too cold.
Refrigerator
compartment
too cold.
Refrigerator
compartment
too warm.