GE Refrigerator Error Code 40

Error code 40 on a GE refrigerator indicates a short circuit in the transistor on the control board that drives the icemaker water inlet solenoid. This means the board has detected abnormal current in that circuit. Ice production will typically stop when this fault is active. A technician will need to inspect the solenoid, wiring, and potentially the control module to resolve it.

This error does not represent an immediate safety hazard to your household. The refrigerator and freezer cooling functions continue to operate normally. However, a shorted electrical component should be addressed promptly to prevent further damage to the control board or related wiring.

Resetting the refrigerator by unplugging it may temporarily clear the code from the display, but the error will return if the underlying fault with the solenoid transistor or solenoid itself has not been repaired. A reset is useful for confirming the fault is active and repeatable, but it is not a fix. The electrical fault must be diagnosed and corrected to permanently resolve the error.

A knowledgeable DIYer can check the wiring and connectors leading to the icemaker solenoid for visible damage. Measuring solenoid resistance requires a multimeter and some comfort with appliance diagnostics. If the solenoid or control board needs replacement, the repair is straightforward but does involve working with electrical components, so comfort with basic appliance repair is recommended.

If only the water inlet solenoid needs replacement, parts typically range from $20 to $60 depending on the model, plus labor if applicable. If the main control module requires replacement, parts costs are generally in the $80 to $200 range. Diagnostic labor from a technician will add to the total cost depending on your region and service provider.