Dacor Range, Oven, Cooktop Error Code L22

L22 indicates an over-temperature fault in the lower oven, meaning the control board has detected temperatures exceeding safe limits in that cavity. The fault is typically caused by a temperature sensor that is out of calibration or has failed, though a stuck relay or shorted heating element can also be responsible. The oven will typically suspend normal operation until the condition is diagnosed and corrected.

You should not continue using the oven while L22 is active. If the oven is genuinely overheating due to a stuck relay or shorted element, continued operation poses a fire and safety risk. Even if the fault is only a bad sensor, the control board cannot properly regulate temperature, making accurate cooking impossible and potentially unsafe.

Repair costs vary depending on the root cause. A replacement RTD temperature sensor typically costs between $30 and $80 for the part, plus labor if a technician is hired. Control board replacement is the most expensive scenario, with parts ranging from $150 to $400 or more depending on the model. Adding a technician's diagnostic and labor fees, total repair costs can range from $100 to $600 or higher.

A knowledgeable DIYer can diagnose this code by testing the lower oven RTD sensor with a multimeter and checking resistance against expected values at room temperature, typically around 1080 to 1100 ohms. Inspecting the sensor wiring harness for damage is also a straightforward step. However, if the fault points to a stuck relay or a failed control board, those repairs are better handled by a qualified technician due to the high-voltage components involved.

A power reset, by turning off the circuit breaker for one to two minutes and restoring power, may temporarily clear the L22 code. However, if the underlying cause such as a failed sensor, damaged wiring, or a stuck relay has not been repaired, the code will return during the next use. A reset alone is not a fix.