Written by
Elena Navarro Appliance Repair Content SpecialistPublished September 11, 2026Updated October 20, 2026
Error codeU33 / L33
ApplianceWall Oven
Quick answer
U33 and L33 report a shorted temperature probe 2 on Dacor wall ovens, with probe 1 as the primary probe.
Model compatibility: Dacor reuses codes across series and model years, so U33 / L33 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Temperature probe 2 shorted.
U33 and L33 show TEMP SENSOR when probe 2 is shorted (U for the upper or single oven, L for the lower). The oven calls it a fatal error once 60 seconds of continuous values fall below the minimum bounds.
Operation in the meantime
Probe 1 is relied on as the primary. Cooking and cleaning stay available, and temperatures may be slightly off. The manual’s guidance is still to call for service.
For the technician
Checking begins with the relay board connections and the probe connector. A poor connection, a bad probe or a bad wire is what the manual expects to find, and replacing the probe or the harness follows if tightening the connection is not enough.
Series
Dacor 27- and 30-inch single and double wall ovens in the Dacor Wall Oven Service Manual.
Related codes
U32 is the open reading on probe 2. U31 is probe 1 shorted, and U34 is probe 3 open.
Dacor wall oven service in Los Angeles
Call (310) 742-1907 for Dacor wall oven service in Los Angeles when U33 or L33 shows. Keep the model number close and say how the oven has been cooking lately. Details sit on the wall oven repair page.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Dacor appliance?
Book a specialist visit for a clear estimate and approval before any repair.
