Written by
Elena Navarro Appliance Repair Content SpecialistPublished September 11, 2026Updated October 20, 2026
Error codeU41 / L41
ApplianceWall Oven
Quick answer
U41 and L41 mean the watchdog circuit on the relay board has failed on Dacor wall ovens.
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.
Seeing U41 or L41 on a Dacor wall oven means the oven reports an A/D error on its relay board: a watchdog circuit there has failed. U belongs to the upper or single oven, L to the lower oven. It is listed in the service manual for 27-inch and 30-inch single and double touch-glass ovens, which does not name a series.
The manual entry
The only source given is a bad relay board, and the solution is to replace the relay board. No owner check is listed. The manual states that no functions are available, so the oven will not cook or clean while the code is active.
What to do
Turn the oven off at the circuit breaker if it is safe to reach and call for service. The relay board is a technician repair.
If you saw another relay board code
U40 / L40 – wiggler failure between logic and relay boards
Los Angeles owners can reach Dacor oven repair at (310) 742-1907. Please give the code, the oven model number and what the display looked like when the oven stopped.
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.
