GE Oven Error Code C5

C5 indicates a communication failure between the oven's control board and the lower temperature encoder. The encoder is responsible for transmitting temperature selection data to the control board. This fault means that signal link has been lost or is unreliable. The oven may not operate normally until the underlying cause is corrected.

It is not recommended to continue using the oven while C5 is active. A communication failure with the temperature encoder means the oven may not regulate temperature accurately, which can be a safety concern. Avoid operating the appliance until the fault is diagnosed and repaired.

Repair costs depend on which component is at fault. A harness repair or connector fix is relatively inexpensive, often in the range of $20 to $80 in parts if a new harness is needed. Encoder replacement typically runs $30 to $100 for the part, while a control board replacement can range from $150 to $350 or more for parts alone, not including labor if a technician is hired.

A knowledgeable DIYer can start by inspecting the wiring harness connected to the lower temperature encoder for loose connectors, corrosion, or visible wire damage. If the harness appears intact, replacing the encoder is the next step. However, if the control board needs replacement, that repair requires more comfort with appliance electronics and is often better handled by a technician.

Resetting the oven by cutting power at the breaker for a few minutes may temporarily clear the C5 code, but the error will return if the underlying issue is not fixed. A persistent C5 after reset confirms an actual hardware or wiring problem that requires hands-on diagnosis and repair.