Dacor Range, Oven, Cooktop Error Code L23

L23 indicates that the ambient temperature surrounding the relay board in the lower oven section has exceeded a safe operating threshold. This is a protective fault that shuts down operation to prevent damage to the relay board and associated control electronics. It is not a fault indicating the oven cavity itself has overheated beyond its cooking set point. The underlying cause is typically a ventilation or cooling system problem.

Resetting the oven by cycling power may temporarily clear the L23 code, but it will return if the underlying cause of the heat buildup has not been corrected. A reset does not fix the ventilation, cooling fan, or insulation issue causing the fault. Treating the reset as a repair is not recommended, as repeated thermal stress can degrade the relay board over time.

Repair costs vary depending on the root cause. If the fix involves clearing a blocked vent or repositioning insulation, costs may be limited to a service call fee, typically in the range of $75 to $150. If the cooling fan needs replacement, parts and labor combined often range from $150 to $350. Relay board replacement on a Dacor appliance tends to be more expensive, generally in the $300 to $600 range depending on the specific model and labor rates in your area.

No, you should stop using the oven until the fault is resolved. The L23 code exists to protect the relay board from heat damage, and continuing to operate the oven in this condition risks permanent damage to the control electronics. In some cases it could also indicate that excessive heat is present in areas that should remain cool, which warrants inspection before further use.

Start by checking that all ventilation openings on and around the oven are clear and that the oven has the required clearances from surrounding cabinetry. Next, verify that the cooling fan is operating and spinning freely. If ventilation is adequate, inspect the oven cavity insulation for damage or displacement. If those checks do not resolve the issue, the relay board may require inspection or replacement by a qualified technician.