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Error code reference

Dacor Oven Error Code L35

Lower oven temp sensor shorted probe 3

Dacor codesDacor oven codes

Lower oven temp sensor shorted probe 3 - A/D value of 0X0010 or lower registered for 60 continuous seconds.

First step from the service manual

Verify connections at relay board. Verify probe state at probe connector.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What L35 means on a Dacor oven

The L35 error code on a Dacor oven indicates that the lower oven temperature sensor (probe 3) has detected a shorted condition. Specifically, the analog-to-digital converter on the control system has registered a value of 0x0010 or lower for a continuous period of 60 seconds. This extremely low A/D value signals that the resistance across the sensor circuit has dropped to near zero, which is the electrical signature of a short circuit rather than a normal open-circuit thermistor reading. The lower oven probe is a resistance-based temperature sensor whose resistance changes predictably with temperature, and a shorted probe collapses that resistance artificially, sending an invalid signal to the control board.

The relay board plays a central role in routing sensor signals, which is why the first diagnostic step involves verifying connections at that board as well as at the probe connector itself. A short can originate at several points in the circuit: the probe element itself, the wiring harness between the probe and the relay board, or a failed connector with pins that have been pushed together or have corroded to create a low-resistance path. Physical damage to the probe from prolonged high heat, grease contamination, or contact with the oven cavity surfaces can also cause the probe body to short internally.

Because the fault must persist for 60 continuous seconds before the code triggers, intermittent connection problems that briefly recover will not always generate this error. When L35 does appear, it typically reflects a consistent short that will not self-resolve. Diagnosing the issue requires isolating the probe from the circuit and measuring its resistance directly, then inspecting the harness and connector for visible damage or contact faults before concluding that the relay board itself is involved.

Source: manufacturer service documentation.

Common causes of L35

  1. 01

    Failed lower oven temperature probe (internal short)

    Part replacement

    The probe element itself can develop an internal short due to prolonged heat exposure, physical contact with the oven cavity, or cracking of the probe housing. Disconnect the probe and measure its resistance directly; a near-zero reading confirms the probe is shorted.

  2. 02

    Damaged or pinched wiring harness

    Part replacement

    The wiring between the probe connector and the relay board can be pinched, abraded, or melted, causing the two conductors to contact each other and create a short. Inspect the full length of the harness for visible damage, especially near any sharp cabinet edges or heat sources.

  3. 03

    Loose or contaminated probe connector

    Wiring / connection

    Grease, moisture, or connector pin deformation at the probe connector can create a low-resistance path between terminals. Inspect the connector for bent pins, corrosion, or debris, and reseat the connection firmly after cleaning.

  4. 04

    Poor connection at the relay board

    Wiring / connection

    A loose or corroded sensor connection at the relay board can produce erratic A/D readings including falsely low values. Verify that the sensor harness connector is fully seated at the relay board and that the terminals show no oxidation.

  5. 05

    Faulty relay board

    Part replacement

    If the probe and harness both test within normal resistance ranges and all connectors are secure, a defective relay board that is misreading the sensor signal may be the cause. This is the least common cause and should only be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about L35

What does L35 mean on a Dacor oven?
L35 indicates that the lower oven temperature sensor, specifically probe 3, has registered a shorted condition. The oven's control system detected an analog-to-digital value of 0x0010 or lower for 60 continuous seconds, which signals a near-zero resistance reading consistent with a short circuit in the sensor or its wiring. Normal operation cannot resume until the fault is resolved.
Can I fix the L35 error myself?
A knowledgeable DIYer can start by checking that all connectors at the relay board and probe connector are fully seated and free of corrosion. If the connections look intact, testing the probe resistance with a multimeter after disconnecting it from the circuit is the next step. Replacing a faulty probe is a manageable repair for someone comfortable working with appliance wiring, but if the relay board is involved, professional service is recommended.
Is it safe to use my Dacor oven while the L35 code is active?
No, you should not continue using the oven while L35 is active. A shorted temperature sensor means the oven cannot accurately monitor its own temperature, which creates a risk of uncontrolled overheating. The oven should remain off until the sensor circuit has been inspected and the fault corrected.
Will resetting the oven clear the L35 error?
A power reset may temporarily clear the displayed code, but L35 will return if the underlying short circuit in the sensor or wiring has not been repaired. Because the fault must persist for 60 continuous seconds to trigger, a reset only delays diagnosis and does not address the root cause. The sensor circuit must be inspected and repaired before the error stays resolved.
How much does it cost to repair the L35 error on a Dacor oven?
Repair costs vary depending on which component has failed. A replacement lower oven temperature probe typically costs between $30 and $80 for the part alone. If the relay board requires replacement, parts alone can range from $100 to $300 or more. Adding professional labor, total repair costs commonly fall between $150 and $450 depending on the diagnosis and your location.

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