Dacor Oven Error Code L24

The L24 error code on a Dacor oven indicates that the lower oven ambient temperature probe has developed an open circuit condition. The control board monitors the probe's signal through an analog-to-digital converter, and when the A/D value reaches 0xF0 or higher, the system interprets this as a loss of continuity in the probe circuit. An ambient temperature probe is distinct from the standard oven cavity sensor: it monitors the temperature of the air surrounding internal components rather than the cooking cavity itself, helping the control system protect electronics from heat damage.

An open circuit in the probe circuit means the signal path has been broken entirely, which causes the A/D reading to rail at its upper limit. This can result from a broken probe element, a severed or disconnected wire harness, corroded connector terminals, or a failed probe that has lost internal continuity. Because the probe is mounted near the lower oven assembly, it is also subject to heat cycling stress over time, which can fatigue the wiring or the probe element itself.

The recommended first diagnostic step is to clear the error and run a basic cooking mode to determine whether the fault is intermittent or persistent. If the error returns, the upper relay board is identified as the next component to address. The relay board governs signal routing and power distribution in this circuit, meaning an internal board fault can produce a false open-circuit reading even when the probe and wiring are intact. A thorough diagnosis should confirm probe continuity and inspect the harness connections before committing to a board replacement.