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Error code reference

Dacor Oven Error Code L32

Lower oven temp sensor open probe 2

Dacor codesDacor oven codes

Lower oven temp sensor open probe 2 - A/D value of 0X3F0 or higher 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 L32 means on a Dacor oven

The L32 error code on a Dacor oven indicates that the lower oven temperature sensor probe 2 has been detected in an open circuit condition. Specifically, the analog-to-digital converter on the relay board has registered a value of 0x3F0 or higher for 60 continuous seconds. This threshold value corresponds to an extremely high resistance or a complete break in the sensor circuit, which the control interprets as a failed or disconnected probe. The lower oven uses this sensor to provide real-time temperature feedback to the control system, and without accurate readings, the oven cannot regulate heat safely or effectively.

The temperature probe in a Dacor oven is a resistance-based sensor, typically an RTD or NTC thermistor type, whose resistance changes predictably with temperature. An open probe condition means the circuit is no longer completing between the probe and the relay board, which drives the A/D reading to its upper limit. This can result from a physically broken probe element, a disconnected or corroded connector at the probe or at the relay board, or damaged wiring in the harness running between the two components.

The first diagnostic step focuses on the relay board connection and the probe connector itself. Technicians should inspect the connector pins at both ends for corrosion, bent terminals, or loose seating. If the connections are intact, the probe should be tested for continuity and correct resistance values at ambient temperature to determine whether the probe element itself has failed. Wiring harness damage from heat exposure is also a common contributor and should be inspected along the full length of the run.

Source: manufacturer service documentation.

Common causes of L32

  1. 01

    Failed temperature probe

    Part replacement

    The probe element inside the oven cavity can break internally, creating an open circuit even if the external connector appears intact. Testing the probe for continuity at its connector will confirm a failure if no continuity is present.

  2. 02

    Loose or disconnected probe connector

    Wiring / connection

    The connector at the probe or at the relay board may have worked loose due to vibration or thermal cycling. Inspect both ends of the connection and reseat the connector firmly.

  3. 03

    Corroded connector terminals

    Wiring / connection

    High heat and moisture can cause the pins at the probe connector or relay board connector to corrode, increasing resistance to the point of an open circuit. Visually inspect terminals and clean or replace as needed.

  4. 04

    Damaged wiring harness

    Part replacement

    The wiring between the probe and the relay board runs through areas exposed to high heat, and insulation can crack or wires can break over time. Inspect the full length of the harness for visible damage, chafing, or melted insulation.

  5. 05

    Faulty relay board

    Part replacement

    If the probe and all wiring connections test correctly, the relay board itself may have a failed A/D input or damaged circuitry that is misreading the sensor signal. This is the least common cause and should be diagnosed after ruling out probe and wiring issues.

See the test procedure for each cause

Frequently asked questions about L32

What does L32 mean on a Dacor oven?
L32 indicates that the lower oven temperature sensor probe 2 is in an open circuit condition. The relay board's analog-to-digital converter has registered a value of 0x3F0 or higher for 60 continuous seconds, which signals that the probe is disconnected or has failed. The oven cannot regulate lower oven temperature without a functioning sensor reading.
Can I fix the L32 error myself?
Some causes of L32 are DIY-friendly, such as reseating a loose connector at the probe or relay board. However, replacing the temperature probe or the relay board requires accessing internal components and working with electrical connections, which is better suited to technicians with appliance repair experience. Always disconnect power to the oven before inspecting any wiring or connectors.
Is it safe to use my Dacor oven while L32 is displayed?
No, you should not use the oven while L32 is active. Without a functional temperature sensor, the control system cannot accurately monitor or regulate heat in the lower oven cavity. This could result in overheating or unpredictable temperature behavior, creating both a safety risk and potential damage to food and the appliance.
Will resetting the oven clear the L32 error?
A power reset may temporarily clear the error display, but L32 will return if the underlying fault is still present. The code is triggered after 60 continuous seconds of an out-of-range A/D reading, so unless the probe, connectors, or wiring are repaired, the fault will reappear once the oven goes through its startup or heating cycle.
How much does it cost to repair an L32 error on a Dacor oven?
Repair costs vary depending on the root cause. Replacing a lower oven temperature probe typically costs between $50 and $150 for the part, plus labor if a technician is involved. A relay board replacement can range from $150 to $400 or more for the part alone. Adding professional labor charges, total repair costs generally fall between $150 and $600 depending on the component and service provider.

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