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Error Code
Error
Possible Cause
Test/Action
For SO24:
1
Check the wiring to all elements.
2
Measure the resistance of the bake element and
the convection element.
3
Replace the relay board.
E44/F26
Increase in water
temperature is slow.
Defective evaporator
heater.
Temperature sensor
100C temperature
limiter is not resetting.
Defective level
measure pin.
1
Check the resistance of the evaporator heater.
2
Check the resistance of the temperature sensor
100C.
3
Replace the evaporator, temperature sensor
100C, and level measure pin.
4
Replace the control board.
E45/F8
Actuator relay K3
stuck.
Element or relay board
damaged.
1
Check the resistance of the element.
2
Check the resistance of the element to ground.
3
Replace the relay board.
E46/F8
Actuator relay K4
stuck.
Element or relay board
damaged.
1
Check the resistance of the element.
2
Check the resistance of the element to ground.
3
Replace the relay board.
E47/F8
Actuator relay K5
stuck.
Element or relay board
damaged.
1
Check the resistance of the element.
2
Check the resistance of the element to ground.
3
Replace the relay board.
E48/F8
Actuator relay K6
stuck.
Element or relay board
damaged.
1
Check the resistance of the element.
2
Check the resistance of the element to ground.
3
Replace the relay board.
E49/F8
Actuator relay K7
stuck.
Element or relay board
damaged.
1
Check the resistance of the element.
2
Check the resistance of the element to ground.
3
Replace the relay board.
E50/F25
Moisture on the control
board.
Room air fan not
working.
Steam leak.
1
Check the operation of the room air fan.
2
Check the resistance of the room air fan.
3
Check for a steam leak from the door, gasket, and
exhaust duct.
4
Replace the control board.
E51/F6
Relay calibration
invalid.
Replace the relay board.
E52/F10
Water tank leaking.
Water valve not tight.
Defective or damaged
water sensing system.
1
Inspect the water valve.
2
Inspect the water tank.
3
Inspect the water sensing system.
4
Replace the control board.
E53
RTC calibration invalid.
Replace the relay board.
E54/F7
Actuator, relay board
locked.
Error E43 to E49
acknowledged 10
times. Relay board
stays blocked for
safety.
1
Replace the relay board.
2
After replacing the relay board, determine the
reason for error E43 to E49.
E55
Program control data
invalid.
Error only occurs
during operation.
1
Turn the power to the unit off and then back on
again. Run unit again.
2
Replace the control board.
E Series SO24 (SWS 13543126)
Troubleshooting
Troubleshooting Guide
service.subzero.com
827705 REVA 01/2019
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