Dacor Oven Error Code L24

The L24 code means the lower oven ambient temperature probe circuit is registering an open circuit condition. The control board's analog-to-digital converter is reading a value of 0xF0 or higher, which indicates the probe signal has been lost entirely. This probe monitors heat levels around the oven's internal components rather than the cooking cavity itself. The fault can stem from a failed probe, broken wiring, or a faulty upper relay board.

Clearing the error is actually the first recommended diagnostic step, so a reset may temporarily remove the code. However, if the underlying fault in the probe circuit persists, the L24 code will return once the oven runs a cooking cycle. A reset alone should not be treated as a fix, only as a way to determine whether the fault is intermittent or ongoing.

Repair costs vary depending on the root cause. If only the ambient temperature probe needs replacement, parts and labor typically fall in the range of $100 to $250. If the upper relay board is the culprit, that repair can range from $200 to $450 or more depending on parts availability and labor rates in your area. A diagnostic service call alone generally costs between $75 and $150 before any parts are factored in.

Some steps are DIY-friendly: clearing the code and running a basic cooking mode to check if the fault returns costs nothing and is the recommended first action. Inspecting and reseating wire harness connectors is also within reach for a careful homeowner. However, testing probe continuity with a multimeter and replacing the upper relay board are tasks better suited to a technician with appliance repair experience.

The ambient probe is designed to protect the oven's internal electronics from heat damage, so operating the oven with a confirmed open probe circuit means that protection is not functioning. While the oven may still cook normally in the short term, continued use without a working ambient sensor risks heat-related damage to control components. It is advisable to address the fault promptly rather than operating the oven indefinitely with L24 active.