Error Code Error Possible Cause Test/Action
E29/F9
Leaking steam. Slider stuck or
defective.
Cooking space not
tight.
Door not closed
properly.
Seal or conduit to
cavity defective.
Too much cold food in
cavity. Maximum of 6.5
pounds of frozen food
for steam modes.
1 Communicate the maximum amount of frozen
food to the customer.
2 Replace the slider.
3 Inspect the door seal.
4 Inspect the door and hinges for proper closing.
5 If this error occurs with E44, replace the
evaporator.
6 Inspect the connector for the temperature sensor
300C for dirt or moisture.
E30 Real-time clock (RTC)
not initialized.
Replace the relay board.
E31 External RTC error.
1 Replace the control board.
2 Replace the relay board.
E32 Touch button error. Moisture on control
board.
1 Inspect the door seal.
2 Inspect the control board for excessive moisture.
3 Replace the control board.
E33/F12 Temperature - relay
board short circuit.
Excessive moisture on
the relay board.
1 Inspect the relay board for excessive moisture.
2 Inspect for steam leaks.
3 Replace the relay board.
E34/F12 Temperature - relay
board open circuit.
Replace the relay board.
E35/F13
Temperature - relay
board over
temperature.
Power failure during
operation.
1 Remove then restore power to the unit.
2 Verify room air fan operates at low, medium, and
high temperatures.
3 Inspect if installation air supply is appropriate.
4 Replace the relay board.
E36/F14 Temperature - control
board short circuit.
Replace the control board.
E37/F14 Temperature - control
board open circuit.
Replace the control board.
E38/F15 Temperature - control
board over
temperature.
Power failure during
operation.
1 Turn the power to the unit off and then back on.
2 Verify the room air fan operates at all power
levels.
3 Replace the control board.
E39 LCD error. Ribbon cable at X15 is
loose or connector not
locked.
1 Inspect and reseat the ribbon cable at X15.
2 Replace the control board and display.
E41/F2 Short circuit -
evaporator
temperature sensor
100C.
1 Inspect the temperature sensor 100C wiring.
2 Replace the temperature sensor 100C.
3 Replace the control board.
E42/F2 Open circuit -
evaporator
temperature sensor
100C.
1 Replace the temperature sensor 100C.
2 Replace the control board.
E43/F8 Neutral relay K1 or K2
stuck.
K1 or K2 relay failed
self-test.
For CSO:
1 Check the wiring to all elements.
2 Measure the resistance of the element, PTC
heater, and evaporator element.
3 Replace the relay board.
CSO (SWS #13543126)
Troubleshooting
Troubleshooting Guide
service.subzero.com
827703 REV B.1
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