Dacor Range, Oven, Cooktop Error Code C24

C24 on a Dacor Heritage appliance means the control board has detected an open circuit in the ambient temperature thermistor, which monitors the temperature of the electronics compartment. The board cannot receive a valid reading from the sensor, so it generates this fault code and typically suspends normal operation. The fault points to either a failed thermistor, a wiring break, or a connector issue in the sensor circuit.

Operating the oven with an active C24 code is not recommended. The ambient thermistor protects the control electronics by monitoring internal compartment temperature, and without this input, the board cannot detect overheating conditions. Continued use could risk further damage to the control electronics.

Power cycling the oven by turning off the circuit breaker for a few minutes may temporarily clear the C24 code, but it will return if the underlying fault in the thermistor circuit is not corrected. A reset does not repair a broken wire, failed thermistor, or faulty connector. Proper diagnosis and component repair or replacement are necessary for a lasting fix.

A knowledgeable DIYer can attempt to diagnose this code by inspecting wiring connectors and testing the thermistor resistance with a multimeter. If the thermistor has failed or a wire is broken, replacing the component or repairing the harness may resolve the issue. However, if the control board itself is at fault, replacement is more complex and may benefit from professional service.

If only the thermistor needs replacement, parts and labor costs are generally modest, typically in the range of $75 to $200 depending on the service provider and part availability. If the control board has failed and requires replacement, costs can rise significantly, often ranging from $300 to $600 or more for parts and labor.