Written by
Lena Hartwell Appliance Care EditorPublished October 27, 2026
VERIFIED
Error codeU33 / L33
ApplianceWall Oven
Meaning in brief
U33 (upper or single oven) and L33 (lower oven) mean that probe 2 is shorted. TEMP SENSOR is printed on the display. A full minute of unbroken readings past the minimum bounds is what makes the oven declare a fatal error.
Can you keep baking?
Yes. The oven leans on probe 1 as its primary, and neither cooking nor cleaning is withdrawn. Temperatures could be slightly off, which is why the manual still recommends service.
What a technician examines
The visit starts at the relay board plugs and at the probe’s own connector.
Anticipated findings: a weak joint, a faulty probe or a faulty lead.
Should tightening fail to clear it, a new probe or a new harness goes in.
Series
Dacor wall ovens measuring 27 and 30 inches, one or two cavities, are the ones in the service manual.
When U33 or L33 appears, call (415) 687-5926. Keep the model number close and describe how the oven has been cooking lately. The Dacor wall oven repair listing adds detail.
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 reads shorted.
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.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
Ready to get your Dacor appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
