Written by
Lena Hartwell Appliance Care EditorPublished October 27, 2026
VERIFIED
Error codeU55 / L55
ApplianceWall Oven
On the top or only oven the display reads U55; on the bottom oven it reads L55. Either way, the motor that drives the door latch gets no power or too little. The control turns the motor and expects to count four revolutions before it declares a door motor failure.
No oven functions are available while the code is up
The manual says to call for service
Where to look
The motor itself or the relay board may be at fault.
What the repair involves
Measure the power at J17, across pins 2 and 4
Based on the reading, install either a replacement latch motor mechanism or a replacement relay board
Ovens covered
Dacor wall ovens measuring 27 or 30 inches, single or double, with glass touch controls. The manual leaves the series unnamed.
Related latch codes
U54 / L54: the lock enable does not fit the temperature
For help in San Francisco and nearby towns, call (415) 687-5926 and mention Dacor wall oven repair. Have the code, the model number and the last time the door locked without trouble on hand.
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
Power to the door latch motor is absent or too low.
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.
