Dacor Range, Oven, Cooktop Error Code U54

U54 indicates a fault in the door latch system for the upper or single oven, specifically caused by a bad relay board. The relay board controls the power sent to the latch motor that locks and unlocks the oven door. When this board fails, the oven cannot confirm proper latch operation and displays the U54 code. Repair typically requires inspection and replacement of the relay board.

Using the oven for standard baking or cooking may be possible in some cases, but it is not recommended when a latch fault is present. The door latch is a critical safety component, especially during self-clean cycles, where the door must lock securely to prevent opening at extreme temperatures. Until the fault is resolved, avoid initiating any self-clean cycle.

Repair costs vary depending on parts pricing and labor rates in your area. Relay board replacement parts typically range from around $100 to $300 or more depending on the specific model. Adding professional labor, total repair costs commonly fall in the $200 to $500 range, though this can vary significantly based on technician rates and part availability.

A basic visual inspection of wiring harness connections to the latch motor is something a knowledgeable DIYer can attempt. However, replacing the relay board involves working near high-voltage components and requires disconnecting power to the appliance safely. If you are not comfortable with appliance electrical repair, a qualified technician should handle the diagnosis and replacement.

Resetting the oven by cutting power at the breaker for several minutes may temporarily clear the code, but it will return if the underlying relay board fault is still present. A reset does not repair a failed relay or damaged board component. Persistent U54 errors after a reset confirm that the relay board or associated components need physical inspection and likely replacement.