Dacor Oven Error Code L25

L25 means the lower oven ambient temperature probe has been detected as shorted. The oven's control system monitors the analog-to-digital value from this probe, and when that value drops to 0X10 or lower, the L25 code is stored. This indicates either a failed probe, a wiring short, or a problem with the upper relay board that processes the probe signal.

A shorted ambient probe can prevent the control system from accurately monitoring oven cavity temperature, which reduces the reliability of thermal protection features. It is best to avoid using the oven until the fault is diagnosed and repaired. Continued use with a compromised temperature sensing circuit could result in inaccurate cooking temperatures or unexpected control behavior.

Repair costs vary depending on which component is at fault. A replacement ambient temperature probe typically falls in the range of $20 to $80 for the part alone. A new upper relay board is generally more expensive, often ranging from $100 to $300 or more depending on the specific model. Adding labor costs for a qualified appliance technician will increase the total, commonly bringing the overall repair to somewhere between $150 and $500 depending on parts needed and local rates.

Some basic steps, like clearing the code and running a test cycle, can be performed without special tools. However, properly diagnosing whether the fault lies in the ambient probe, the wiring harness, or the upper relay board requires the ability to inspect internal components and connectors. Replacing the relay board or probe involves disassembly of the oven and working near high-voltage components, so a qualified technician is recommended if you are not experienced with appliance repair.

Clearing the error code is actually the first recommended diagnostic step, and in some cases the fault may not return if it was caused by a temporary condition or a power anomaly. However, if the underlying cause is a shorted probe, a damaged harness, or a faulty upper relay board, the L25 code will return once the oven runs a cooking cycle. A clear that does not result in a returning fault suggests the event was intermittent.