Dacor Wall Oven U23 / L23 Error Code

U23 (upper or single oven) and L23 (lower oven) are ambient over temperature errors. The thermistor on the relay board registered an ambient temperature above 80°C, and the display reads OVER TEMP.

What the oven does

The oven shuts down and the cooling fans are set to high speed until the ambient temperature falls to 50°C. Five excursions are allowed before a permanent error occurs, and functionality returns once the oven cools to room temperature unless it happens more than 5 times.

What the manual asks the owner to do

1. Call the customer service line to report the occurrence.
2. Let the oven return to room temperature.
3. Check that the exhaust area, the inlet at the bottom of the door and the inlet grill on the top front of the oven are not blocked.
4. Press any key to resume service.
5. If it occurs more than 5 times, the oven locks out and you must call for service.

Possible reasons

The manual points to extreme ambient conditions, meaning high temperature and high humidity, or to blocked airflow. A bad thermistor on the relay board is something a technician looks at if the error remains.

Which ovens

Dacor 27- and 30-inch single and double wall ovens in the Dacor Wall Oven Service Manual.

Related codes

U24 and U25 cover the same relay board thermistor reading open or shorted. U22 is a probe amplifier failure.

Dacor wall oven service in Los Angeles

If U23 or L23 keeps returning, call (310) 742-1907 for Dacor wall oven service in Los Angeles. Count how many times the code has shown up and have the model number nearby. See wall oven repair.

Source: Dacor Wall Oven Service Manual, Appendix B Error Code Troubleshooting Guide