GE Range Error Code ER 24

ER 24 is a fault code tied to the MTwisT control system used in certain GE ranges. MTwisT is a proprietary control architecture that manages communication and coordination between the main control board and the relay board, which handles the switching of high-voltage components such as bake and broil elements, surface burner igniters, and convection systems. The ER 24 code specifically indicates that the control has detected a mismatch in the number of relays reported or recognized by the system, meaning the relay count the main board expects does not match what is being detected during initialization or operation.

This type of fault most commonly points to a failure in communication between the main control board and the relay board, or to a hardware fault on the relay board itself where one or more relays have failed in a way that makes them undetectable to the control logic. It can also result from a wiring harness issue, such as a loose or corroded connector between the two boards, which would cause intermittent or incomplete relay enumeration. In some cases, installing an incorrect or incompatible replacement relay board can trigger this fault if the new board does not match the relay configuration the control software expects.

Because this fault directly involves the relay board and control board communication, it is not a condition that can be resolved through a simple reset alone. The underlying hardware or wiring problem must be identified and corrected. Technicians should inspect all connectors between the main board and relay board, verify board compatibility, and test the relay board for failed relay circuits before replacing components.