Dacor Range, Oven, Cooktop Error Code U55

U55 indicates a fault in the door latch system of the upper or single oven cavity. The code points to a problem with either the latch motor, which physically moves the door lock, or the relay board that controls power to that motor. The oven triggers this code when it cannot confirm a successful latch operation, typically during or before a self-clean cycle.

Basic baking and cooking functions may still work depending on how the failure has manifested, but the self-clean cycle should not be attempted while U55 is active. A non-functioning door latch is a safety concern specifically for self-clean operation, which requires the door to be securely locked during extreme heat. Resolve the latch fault before running any self-clean cycle.

Repair costs vary depending on which component has failed. A latch motor replacement typically falls in the range of $75 to $200 for the part alone, while a relay board can range from $100 to $300 or more depending on the model. Adding professional labor costs, total repair estimates generally range from $150 to $500. Getting a diagnostic quote from a technician before committing to repairs is recommended.

Some causes of U55, such as a jammed latch mechanism or a loose wiring connector, can be addressed without replacing parts. However, replacing the latch motor or relay board requires working near high-voltage components and a solid understanding of appliance repair. If you are not comfortable with electrical diagnostics, a qualified technician is the safer choice.

A power reset by turning off the circuit breaker for one to two minutes may temporarily clear the code, but it will return if the underlying hardware fault is still present. U55 reflects a real component failure in the latch motor or relay board, so a reset alone is not a repair. The fault must be diagnosed and the defective part replaced to permanently clear the code.