GE Range Error Code F73

The F73 error code on a GE range indicates that the RPSM (Range Power Supply Module) has detected an anomaly in the incoming line power. The RPSM continuously monitors the AC line voltage supplied to the range, and when it detects a dropout, sag, or interruption in that supply, it triggers this fault code. This module serves as a critical interface between the household electrical supply and the range's control systems, so any instability in the incoming power will be flagged immediately.

Line power dropouts can result from several conditions: a momentary grid fluctuation from the utility, a loose or corroded connection at the terminal block, a failing circuit breaker, or wiring issues within the home's electrical panel or junction points. Ranges typically require a dedicated 240V circuit, and any degradation in either the L1 or L2 leg of that supply can trigger this fault. Intermittent faults are particularly common when terminal block connections have loosened due to heat cycling over time.

If the line power supply checks out as stable and properly connected, the RPSM itself may be faulty and generating a false positive fault. In that scenario, the module must be replaced to resolve the error. Diagnosis should begin by verifying the incoming voltage at the terminal block under load conditions, checking for loose connections throughout the supply circuit, and then evaluating whether the RPSM needs replacement.