Dacor Range, Oven, Cooktop Error Code L55

L55 indicates a fault in the lower oven door latch system. The control board has detected that either the latch motor or the relay board controlling it has failed or is not responding correctly. This fault typically surfaces in connection with self-clean cycle operation, where a functioning door latch is required.

Normal baking and cooking functions may still operate with this code present, but you should not attempt to run a self-clean cycle. The self-clean cycle requires the door latch to secure properly, and running it with a faulty latch system could leave the door unlocked at extremely high temperatures, creating a safety hazard.

Repair costs vary depending on which component has failed. A latch motor replacement typically falls in the range of $150 to $350 including parts and labor, while a relay board replacement can range from $200 to $500 or more depending on parts availability and local labor rates. Obtaining a diagnostic quote from a technician is the best way to get an accurate estimate for your specific model.

A mechanically blocked latch can sometimes be cleared by a careful homeowner after unplugging the appliance and inspecting the latch assembly for debris or obstructions. However, testing motor windings and relay board voltages requires a multimeter and comfort working with electrical components, so most homeowners are better served by a qualified appliance technician for those steps.

A power reset by unplugging the oven or turning off the circuit breaker for a few minutes may temporarily clear the code, but if the underlying component, whether the latch motor or relay board, is actually faulty, the code will return when the latch system is activated again. A reset alone does not repair the defective hardware.