GE Range Error Code F72

The F72 error code on a GE range indicates a LIN communication failure between the main logic board and one or more slave devices connected to the LIN (Local Interconnect Network) bus. The most common slave device involved is the RPSM (Remote Power Supply Module) board. LIN is a low-speed serial communication protocol used to coordinate signals between control boards within the appliance. When the main logic board loses communication with a slave node, it triggers F72 to alert the technician that the control network has been disrupted.

This failure can stem from several points in the communication path. A damaged, pinched, or open LIN wire within the wiring harness is the most common physical cause. Because the LIN bus operates as a single-wire network referenced to ground, any break or short in that wire will sever communication to all downstream slave devices simultaneously. Connector corrosion, loose terminals, or a wire that has chafed against a sharp edge inside the range chassis are typical physical culprits.

If the wiring harness checks out as intact and properly seated, the RPSM board itself may have failed internally and is no longer responding to the main logic board's polling. In cases where the harness and RPSM are both functional, the main logic board may be at fault, as it is responsible for initiating and managing LIN bus communication. Diagnostics should follow the sequence of checking the LIN wire first, then replacing the RPSM, and finally replacing the main logic board if prior steps do not resolve the fault.