Dacor Range Oven Cooktop Error Code L52

The L52 error code on a Dacor range or oven indicates a fault in the lower oven door latch system. This system is critical during self-clean cycles, when the control board commands the latch motor to engage and physically lock the door. The control board monitors switch feedback signals to confirm that the latch has moved to the fully locked or fully unlocked position. When those signals are missing, contradictory, or out of sequence, the L52 code is triggered and the self-clean cycle is prevented from starting or continuing.

The most likely hardware culprits are the lock switches themselves. Most Dacor lower oven latch assemblies include two microswitch positions: one confirming the door is locked and one confirming it is unlocked. If either switch fails mechanically, develops an open or short circuit, or becomes misaligned so its actuator is not fully depressed, the control board receives an invalid state and logs L52. Physical inspection of the latch motor assembly should include checking for debris, worn switch actuators, and continuity across each switch position.

The secondary cause identified for L52 is a faulty relay board. The relay board is responsible for switching power to the latch motor and routing the switch feedback signals back to the main control. A failed relay or a damaged trace on the relay board can interrupt this communication path even when the latch hardware itself is fully functional. Diagnosis should include checking the relay board for signs of heat damage, failed solder joints, or relay contacts that are stuck open or closed.