Dacor Oven Error Code C24

C24 means the Dacor oven's control board has detected an open circuit in the ambient temperature thermistor, which is the probe that monitors the temperature of the control electronics. An open circuit means the board is receiving no resistance signal from the probe at all. This can be caused by a failed probe, broken wiring, or a loose connector. The oven may restrict operation until the fault is resolved.

Operating the oven with an active C24 fault is not recommended. The ambient thermistor exists to protect the control electronics from heat damage, and without a functioning probe the board cannot monitor its own operating temperature. Continued use could risk damaging the control board or other electronic components. It is best to resolve the fault before using the oven.

Repair costs vary depending on the root cause. If only the ambient thermistor needs replacement, parts typically fall in the range of $20 to $80, with labor adding $100 to $200 if a technician performs the work. If the control board has failed, board replacement costs can range from $200 to $600 or more for parts, plus labor. Getting a diagnostic service call first is a good way to confirm which component has failed before committing to parts.

A knowledgeable DIYer can perform some of the initial diagnostics, such as checking that wiring connectors are fully seated and visually inspecting the harness for obvious damage. Testing the thermistor with a multimeter for continuity requires comfort working with oven electronics. Replacing the ambient thermistor or control board involves disassembly of the control panel area and should only be attempted by someone experienced with appliance repair.

A power reset, such as unplugging the oven or cycling the circuit breaker for several minutes, may temporarily clear the C24 code. However, if the underlying problem with the ambient thermistor or its wiring is still present, the code will return once the oven powers back on and the control board re-runs its diagnostics. A reset alone is not a repair.