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On the Main Control Board CSM
A CSM is a protective device that is part of GE Dishwashers, and is located on the main control board. This
device is designed to trip if current leakage to ground is above 20mA ± 5mA is detected. The CSM functions
similar to commercially available GFCIs; if tripped, the dishwasher is non-responsive. Entering Consumer
Error Mode
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door is closed, the LED's will remain solid for 10 seconds. If there are active error codes logged, they will be
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(see Consumer Error Mode in the Electronic Controls section of this service guide). The Service LED on the
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Service
Mode is entered.
The cause of tripping is likely external to the board itself. The board should only be replaced after all
other diagnostic tests have been completed and all other potential causes have been ruled out. Potential
causes of current leakage to ground could be due to water leaking onto a live component, a component
malfunction, or a fault within the wiring harness. If water caused the CSM to trip, the leak must be repaired.
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underlying issue will likely result in a repeat call. Always perform a visual inspection of the exposed heating
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tripped condition. To view the Service LED, access the main control, place in a safe position and reapply
power to the dishwasher.
CSM Diagnostics
NOTE: Normal water level must be present when checking the circulation pump, drain pump, and the heater.
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