GE Refrigerator Error Code WATER HEATER ERROR

The WATER HEATER ERROR on a GE refrigerator indicates a fault detected in the water reservoir tank heater circuit. This heater is responsible for preventing the water reservoir from freezing in certain refrigerator configurations, particularly in models where the reservoir is located in a cooler zone. The control board monitors the heater circuit continuously, and when it detects either an open circuit (no continuity) or a short circuit (resistance reading outside acceptable parameters), it triggers this error code.

An open circuit condition typically means the heater element itself has failed internally, or a wiring connection between the heater and the PCB has broken. A shorted condition means the heater's internal resistance has collapsed, causing excessive current draw that the board recognizes as abnormal. Both conditions prevent the heater from operating correctly, which can lead to the water supply line or reservoir freezing and blocking water flow to the dispenser.

The first diagnostic step is to disconnect the heater connector from the PCB and measure resistance across the heater terminals with a multimeter. An open heater will show infinite resistance (OL), while a shorted heater will show near-zero ohms. Either reading confirms a failed heater element. If resistance reads within the expected range, the fault may lie in the wiring harness between the heater and the control board, or the PCB itself may be misreading the circuit.