Written by
Elena Navarro Appliance Repair Content SpecialistPublished September 11, 2026Updated October 20, 2026
Error codeU55 / L55
ApplianceWall Oven
Quick answer
U55 and L55 report a door latch motor failure on Dacor wall ovens; no functions are available.
Model compatibility: Dacor reuses codes across series and model years, so U55 / L55 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
Latch motor failure: power to the door latch motor is absent or too low.
A U55 on the upper or single oven, or L55 on the lower oven, means the door latch motor is not getting power, or not enough to run. The control counts four revolutions before it reports a door motor failure. The entry is from the Dacor manual for 27-inch and 30-inch single and double ovens with touch-glass control; series not named.
Causes and repair
The manual points to a bad motor or a bad relay board. A technician checks the power output at J17, pins 2 and 4, then replaces the latch motor mechanism or the relay board.
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.
