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Error code reference

Dacor Range Oven Cooktop Error Code L35

Temp sensor (lower oven)

Dacor codesDacor range oven cooktop codes

Temp sensor (lower oven) - shorted RTD 3, check wiring at connection points.

First step from the service manual

Check wiring at connection points.

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 range oven cooktop

Error code L35 on a Dacor range or oven indicates a shorted RTD (Resistance Temperature Detector) condition on the lower oven temperature sensor, designated as RTD 3. An RTD sensor works by changing its electrical resistance in proportion to temperature. Under normal operating conditions, the control board reads the sensor's resistance to determine oven cavity temperature. When the resistance drops abnormally low or the circuit reads near zero ohms, the control interprets this as a short circuit and triggers the L35 fault, halting lower oven operation to prevent damage or inaccurate temperature control.

The term "shorted" in this context means the sensor circuit is completing a path with too little resistance, which could indicate the sensor probe itself has failed internally, or that the wiring harness connecting the sensor to the control board has developed a fault. Physical damage to the wiring, such as insulation that has melted or worn through from contact with the oven cavity walls or heating elements, can create a short between conductors or to the chassis ground. Connector corrosion or a pin that has backed out of its housing at a junction point can also produce intermittent or sustained short readings.

The first diagnostic step is to inspect all wiring and connection points along the RTD 3 circuit. This includes examining the sensor probe connector at the back wall of the oven cavity and tracing the harness back toward the control board, checking for any signs of heat damage, pinched wires, or corroded terminals. After confirming wiring integrity, the sensor's resistance should be measured directly at the probe connector. A shorted RTD will typically read near 0 ohms rather than the expected resistance value at room temperature.

Source: manufacturer service documentation.

Common causes of L35

  1. 01

    Failed RTD 3 sensor probe

    Part replacement

    The lower oven RTD sensor can fail internally, causing its resistance to drop to near zero and trigger a short fault. This is the most common cause when wiring inspects cleanly and no physical damage is visible.

  2. 02

    Damaged wiring insulation

    Part replacement

    Wires routed near the oven cavity or heating elements can have their insulation melted or abraded over time, allowing conductors to contact each other or the metal chassis and creating a short circuit. Inspect the full harness length for discoloration, cracking, or bare wire.

  3. 03

    Loose or corroded connector pins

    Wiring / connection

    Connection points along the RTD 3 circuit, including the sensor plug at the oven cavity and any intermediate connectors, can develop corrosion or have pins that have backed out of the housing, causing unintended electrical contact. Clean or reseat connectors and check for bent or pushed-back terminals.

  4. 04

    Pinched wiring harness

    Wiring / connection

    The sensor wire can become pinched between oven components during assembly or after a repair, creating a short at the pinch point. Check any area where the harness passes through panels, brackets, or grommets.

  5. 05

    Control board fault

    Part replacement

    Less commonly, the control board input circuit for RTD 3 can fail, causing it to misread a good sensor as shorted. This should only be suspected after the sensor and all wiring have been confirmed good.

See the test procedure for each cause

Frequently asked questions about L35

What does L35 mean on a Dacor range, oven, cooktop?
L35 indicates a shorted condition detected on RTD 3, which is the temperature sensor for the lower oven. The control board monitors the sensor's resistance to track oven temperature, and when it reads an abnormally low resistance consistent with a short circuit, it triggers L35 and disables the lower oven. The fault points to the sensor itself, the wiring harness, or the connector points along that circuit.
Can I fix the L35 error code myself?
A knowledgeable DIYer can start by inspecting the wiring and connectors for visible damage, corrosion, or loose pins, which requires no special tools and no parts. If the wiring checks out, testing the RTD 3 sensor with a multimeter for near-zero resistance will confirm a failed probe. Replacing the sensor is a moderate-difficulty repair, but working inside an oven involves electrical components, so the appliance should always be unplugged before any inspection or repair.
Is it safe to keep using my oven with an L35 error?
No. The L35 fault means the lower oven's temperature sensing is compromised, and the control board has disabled that section to prevent unsafe operation. Attempting to bypass or ignore the fault could result in uncontrolled heating or further damage to the control board or other components. The oven should remain out of service until the sensor circuit is diagnosed and repaired.
How much does it cost to repair an L35 error on a Dacor oven?
If the repair only requires cleaning corroded connectors or reseating a connector pin, the cost can be minimal, mainly a service call fee in the range of $75 to $150. Replacing the RTD 3 temperature sensor typically adds parts costs in the range of $30 to $100 for the sensor itself. If the control board is ultimately found to be at fault, board replacement can cost between $150 and $400 or more depending on the model.
Will resetting my Dacor oven clear the L35 error code?
Resetting the oven by cycling power at the breaker may temporarily clear the fault display, but if the underlying short condition in the RTD 3 circuit still exists, the L35 code will return as soon as the control board re-reads the sensor. A reset is not a fix and should only be used as part of diagnosis to check whether the fault is intermittent or persistent. The root cause in the sensor or wiring must be corrected for the error to be resolved permanently.

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