Written by
Lena Hartwell Appliance Care EditorPublished October 27, 2026
VERIFIED
Error codeU41 / L41
ApplianceWall Oven
What the oven is saying
A watchdog circuit on the relay board has failed, and the board reports that as an A/D error. U41 belongs to a lone or upper oven, L41 to the lower oven.
Effect on the oven
All functions are unavailable, so neither cooking nor self-cleaning is possible while the code is on.
Manual entry
Cause listed: a bad relay board
Remedy listed: a new relay board
Checks for owners: none given
What to do
If the breaker is safe to reach, turn the oven off there and call for service. A relay board swap is a job for a technician.
Models
Documented for Dacor touch-glass wall ovens with one or two cavities, 27 and 30 inches wide. No series name appears.
Reach us on (415) 687-5926 with the code, the oven model number and a description of the display when the oven stopped. See Dacor wall oven repair too.
Model compatibility: Dacor reuses codes across series and model years, so U41 / L41 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
Relay board A/D error: the watchdog circuit on the relay board failed.
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.
