GE Range Error Code 900

The 900 error code on a GE range indicates a software safety fault called the Cavity Cancel/Off monitor. It means the oven's control system detected that the oven did not stop cooking within the required time after the Cancel key was pressed. If the fault condition persists for a set number of seconds, the control board latches the fault. Pressing Cancel is the first step to attempt a reset.

The 900 code is a safety-related fault designed to alert you that the oven may not be stopping correctly when commanded. Using the oven while this fault is active is not recommended, as the control system may not reliably shut off heating when expected. You should attempt a reset first, and if the fault persists, discontinue oven use until the issue is repaired.

The first step, pressing Cancel to reset the system, is something any user can do safely. Beyond that, diagnosing a latched 900 fault involves inspecting the control board relays, harness connections, and interface board, which requires comfort working with appliance electronics and disconnecting power at the breaker. If the control board needs replacement, a knowledgeable DIYer can often handle it, but if you are unsure about working with high-voltage components, a professional technician is the safer choice.

Pressing the Cancel key is the recommended first diagnostic step and may clear the fault if it was caused by a temporary software glitch. If the 900 code returns immediately after pressing Cancel or after a power cycle, the fault has likely latched due to an underlying hardware issue such as a stuck relay or a failing control board. In that case, further diagnosis is needed.

Repair costs depend on the root cause. If the fault clears with a simple reset, there may be no parts cost at all. If the main control board or relay assembly needs replacement, parts alone can range from roughly $75 to $300 depending on the model, with professional labor adding another $100 to $200 or more. Getting a diagnostic quote from a qualified technician before ordering parts is advisable.