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Error code reference

Dacor Range Oven Cooktop Error Code L24

Over temperature (lower oven)

Dacor codesDacor range oven cooktop codes

Over temperature (lower oven) - ambient temp probe on relay board is open.

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  • Wiring diagram references and connector pinouts from the OEM service manual
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What L24 means on a Dacor range oven cooktop

The L24 error code on a Dacor range or oven indicates an over-temperature condition in the lower oven, specifically caused by an open circuit in the ambient temperature probe located on the relay board. The relay board contains an onboard thermistor or probe that monitors the ambient temperature surrounding the board itself. When this probe reads an open circuit, the control interprets it as an extreme or unreadable temperature condition and triggers the L24 fault to protect the appliance from potential damage.

An open circuit in the ambient temp probe means the electrical pathway through the probe has been broken. This can result from a failed probe element, a broken wire lead, a poor connection at the relay board connector, or physical damage to the probe itself. Because the probe is mounted directly on or near the relay board, heat exposure from the oven cavity over time can degrade the probe's integrity. Corrosion at the connector pins or a cracked solder joint on the board can also produce an open-circuit reading.

Diagnosing L24 requires inspecting the relay board and its associated wiring. A technician should check for continuity through the ambient probe circuit and inspect the connector at the relay board for corrosion, looseness, or broken terminals. If the probe itself is confirmed open, the relay board assembly typically needs replacement, as the ambient probe is generally integrated into the board rather than sold as a standalone serviceable component.

Source: manufacturer service documentation.

Common causes of L24

  1. 01

    Failed ambient temperature probe on relay board

    Part replacement

    The probe element itself has failed internally, creating an open circuit. This is the most direct cause of L24 and typically requires relay board replacement since the probe is integrated into the board.

  2. 02

    Loose or corroded connector at relay board

    Wiring / connection

    The wire harness connector that links the probe circuit to the relay board can loosen or corrode over time, interrupting the circuit. Inspecting and reseating or cleaning the connector may resolve the fault if the probe itself is intact.

  3. 03

    Broken or damaged wire lead to probe

    Part replacement

    A wire in the harness leading to the ambient probe can crack or break due to repeated heat cycling. Visual inspection along the harness length can reveal damaged insulation or a broken conductor.

  4. 04

    Relay board heat damage

    Part replacement

    Prolonged exposure to high oven temperatures can damage the relay board, including cracked solder joints or burned traces near the probe circuit. This type of damage is visible on close inspection of the board surface.

  5. 05

    Actual over-temperature condition

    Wiring / connection

    In some cases the fault is triggered by a genuinely excessive ambient temperature around the relay board, which can result from a cooling fan failure or blocked ventilation. Checking that the oven cooling fan operates correctly is worthwhile before condemning the probe.

See the test procedure for each cause

Frequently asked questions about L24

What does L24 mean on a Dacor range, oven, cooktop?
L24 indicates an over-temperature fault in the lower oven caused by an open circuit in the ambient temperature probe on the relay board. The relay board has a built-in probe that monitors heat levels around the board, and when that probe circuit reads open, the oven triggers L24 and shuts down. This is a protective measure to prevent damage to the control electronics.
Can I fix the L24 error myself?
Some basic checks are possible for a knowledgeable DIYer, such as inspecting the wire harness connectors at the relay board for looseness or corrosion and reseating them. However, if the ambient probe itself has failed, the relay board typically needs to be replaced, which requires safely accessing the oven's control components and working with electrical connections. If you are not comfortable with appliance electrical repairs, a qualified technician is recommended.
Is it safe to use my Dacor oven when L24 is displayed?
No, you should not attempt to operate the oven while L24 is active. The fault indicates that the control system cannot properly monitor ambient temperature around the relay board, meaning a genuine over-temperature condition could go undetected. Continued operation without resolving the fault risks damage to the control board and could create a safety hazard.
Will resetting the oven clear the L24 error code?
A power reset by shutting off the circuit breaker for 30 to 60 seconds may temporarily clear the fault display, but if the underlying cause is an open ambient probe or damaged wiring, the L24 code will return as soon as the oven restarts. A reset alone does not repair the probe circuit and is not a lasting solution.
How much does it cost to repair the L24 error on a Dacor oven?
Repair costs depend on the root cause. If only a connector needs cleaning or reseating, the cost may be limited to a service call fee, typically in the range of $75 to $150. If the relay board requires replacement, parts and labor combined can range from $250 to $600 or more depending on the specific model and local labor rates.

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