Dacor Oven Error Code U54

U54 means the oven has detected a door lock enable failure on the upper or single oven cavity. Specifically, the lock enable output is either active when the oven is below 440 degrees Fahrenheit or not active when the oven is above 650 degrees Fahrenheit. This fault is typically caused by a failing relay board that controls the door latch mechanism.

U54 is a safety-related fault involving the door lock system, which is critical during high-temperature self-clean cycles. Using the oven for standard cooking at moderate temperatures may be possible, but running a self-clean cycle with a malfunctioning door lock is not safe. It is best to have the fault diagnosed and repaired before using the oven extensively.

Repair costs vary depending on whether you need just the relay board or additional components. A replacement relay board for a Dacor oven typically ranges from roughly 80 to 200 dollars for the part alone. If you hire a professional technician, total repair costs including labor can range from 200 to 450 dollars or more depending on your location and the specific model.

Replacing the relay board is the recommended first step and is within reach for experienced DIYers comfortable working with oven electronics. However, the repair involves disassembling the oven's control area and working near high-voltage components, so professional service is recommended if you are not familiar with appliance repair. Confirm the relay board part number matches your specific model before ordering a replacement.

A power reset by turning off the circuit breaker for one to two minutes may temporarily clear the fault display, but U54 will return if the underlying relay board or latch circuit issue has not been repaired. Resetting does not fix the hardware failure causing the fault, so the error should be properly diagnosed rather than repeatedly cleared.