Dacor Wall Oven U31 / L31 Error Code

U31 (upper or single oven) and L31 (lower oven) are shorted-probe codes: probe 1, an RTD, is reading shorted. The display shows TEMP SENSOR, and the oven needs 60 seconds of continuous values over the minimum bounds before it logs a fatal error.

Life with a shorted probe 1

Probe 2 takes over as the primary. Cooking still works, with some chance of shifted temperature calibration, but cleaning does not. Expect results a bit hotter or cooler than usual while you wait; the manual recommends calling for service.

Where technicians look

Loose connections at the relay board, a bad probe and a bad wire in the harness are the manual’s suspects. The first checks happen at the relay board and at the probe connector.

Series

Dacor Renaissance EOR and MOR wall ovens, plus the 27- and 30-inch ovens of the Dacor Wall Oven Service Manual.

Related codes

U30 is the open reading on probe 1. U33 is the shorted reading on probe 2, and U35 is the shorted reading on probe 3.

Dacor wall oven service in Los Angeles

A shorted probe 1 on a Dacor wall oven in Los Angeles is handled by phone first: (310) 742-1907. Please have the U31 or L31 code, the model number and a note on any odd cooking results. Start with wall oven repair if you want an overview.

Source: Dacor Wall Oven Service Manual, Appendix B Error Code Troubleshooting Guide; Dacor Renaissance Wall Oven Service Guide, Section 5 Wall Oven Error Codes