Dacor Oven Error Code L30

L30 means the lower oven temperature sensor probe 1 is reading an open circuit condition. The oven's control system detected an analog-to-digital value of 0x3F0 or higher from the sensor circuit for 60 continuous seconds. This indicates the control cannot receive a valid temperature reading from the lower oven sensor, which can be caused by a failed probe, a loose connector, or a damaged wiring harness.

It is not recommended to use the oven while L30 is active. The code means the control cannot monitor the lower oven temperature, which removes a critical safety check during cooking. Operating the oven in this condition could result in uncontrolled temperatures.

Repair costs vary depending on the failed component. A replacement lower oven temperature probe typically costs between $30 and $80 for the part alone. If the relay board requires replacement, parts can range from $100 to $250 or more. Adding professional labor generally brings the total repair cost to between $150 and $400 depending on the specific diagnosis.

Some causes of the L30 code are DIY-accessible, particularly checking and reseating connectors at the relay board and at the probe itself. If those connections appear intact, testing the probe resistance with a multimeter can confirm whether the probe has failed. Wiring harness repairs and relay board replacement are more involved tasks that may require a technician depending on your comfort level.

A power reset may temporarily clear the L30 code, but the fault will return if the underlying problem is not repaired. Because the code requires the fault condition to persist for 60 continuous seconds before triggering, a reset only clears the displayed error and does not address the open sensor circuit.