Dacor Range, Oven, Cooktop Error Code U24

U24 indicates an over-temperature fault caused by an open circuit in the ambient temperature probe on the relay board of the upper or single oven. The probe monitors the temperature around the control board, and when its circuit goes open, the control cannot get a valid reading and shuts down to prevent damage. This is a component-level fault that requires inspection of the probe, wiring harness, and relay board.

No, you should not attempt to operate the oven while U24 is active. The fault means the relay board ambient probe circuit is open, and the oven's control system cannot properly monitor temperature conditions in the control area. Operating the oven in this state could risk undetected overheating. The appliance should be left off until the fault is diagnosed and repaired.

Repair costs vary depending on which component has failed. If only the ambient probe or its wiring connector needs replacement, costs are typically on the lower end of the repair spectrum. If the full relay board requires replacement, parts and labor costs are considerably higher, often ranging from $200 to $500 or more depending on the specific model and local labor rates. Getting a diagnostic assessment from a technician before committing to parts is advisable.

A knowledgeable DIYer can inspect the relay board area for obvious wiring issues like a disconnected connector, which may resolve the fault without replacing parts. However, testing the ambient probe with a multimeter and replacing the probe or relay board requires comfort working with oven control components and disconnecting power safely. If you are not confident with electrical diagnostics, a qualified technician is recommended.

A power reset by turning off the circuit breaker for 30 to 60 seconds may temporarily clear the error code, but it will return as soon as the control reads the open probe circuit again. The underlying cause, whether a failed probe, broken wiring, or a faulty relay board, must be corrected for the error to be permanently resolved.