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Error code reference

Dacor Range Oven Cooktop Error Code F2

Heating Mode High Temperature

Dacor codesDacor range oven cooktop codes

Heating Mode High Temperature - activated when ERC senses a runaway heat condition or temperature exceeds runaway limits.

First step from the service manual

Check the oven sensor and wiring after first checking for a stuck relay.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What F2 means on a Dacor range oven cooktop

The F2 error code on Dacor ranges, ovens, and cooktops indicates a runaway heat condition detected by the Electronic Range Control (ERC). This fault activates when the ERC senses that oven temperature has exceeded the established runaway threshold limits, meaning the oven is heating beyond its safe operating range without reaching the expected plateau or shutting down properly. The ERC continuously monitors temperature through the oven sensor and compares readings against programmed limits. When temperatures climb past those limits unchecked, F2 is triggered as a safety response.

The two primary hardware culprits behind F2 are a stuck relay on the control board and a faulty oven temperature sensor or its associated wiring. A relay stuck in the closed position will keep voltage flowing to the bake or broil element continuously, driving temperatures into runaway territory regardless of what the ERC commands. If the relay is confirmed functional, attention shifts to the oven sensor itself. A sensor that has drifted out of calibration or has failed open or short can send inaccurate resistance readings to the ERC, causing the control to misread actual cavity temperature and fail to regulate heat correctly.

Wiring between the oven sensor and the ERC is also a factor worth inspecting. Damaged insulation, loose connectors, or a corroded terminal can introduce resistance errors that mimic a failed sensor. The diagnostic sequence calls for checking the relay first, then evaluating the sensor and its wiring harness. Verifying sensor resistance against the correct temperature-to-resistance specification for the installed sensor is a key step in isolating whether the sensor or the control board is the root cause.

Source: manufacturer service documentation.

Common causes of F2

  1. 01

    Stuck Relay on the Control Board

    Part replacement

    A relay on the ERC that is welded or stuck closed keeps the heating element energized continuously, causing temperatures to rise without limit. This is the first item to inspect and can often be identified by the element staying on even when the oven is not actively calling for heat.

  2. 02

    Failed Oven Temperature Sensor

    Part replacement

    The oven sensor may have drifted out of its correct resistance range or failed entirely, sending inaccurate temperature readings to the ERC. A failed sensor either prevents the control from seeing the true cavity temperature or causes it to misregulate the heating cycle.

  3. 03

    Damaged Sensor Wiring or Connectors

    Wiring / connection

    Broken insulation, corroded terminals, or a loose connector in the wiring harness between the sensor and ERC can introduce false resistance values that trigger a runaway condition. Inspect the full length of the wiring for heat damage, pinching, or loose connections at both ends.

  4. 04

    Faulty ERC (Electronic Range Control)

    Part replacement

    If the relay and sensor both test within specification and wiring is intact, the ERC itself may be misinterpreting sensor signals or failing to open the relay circuit properly. This is typically the last component to replace after all other causes are ruled out.

See the test procedure for each cause

Frequently asked questions about F2

What does F2 mean on a Dacor range, oven, cooktop?
F2 indicates that the Electronic Range Control detected a runaway heat condition, meaning oven temperature exceeded safe operating limits without being properly regulated. The ERC triggers this fault as a safety shutoff to prevent damage or hazard. The most common causes are a stuck relay on the control board, a faulty oven temperature sensor, or damaged sensor wiring.
Can I reset the F2 error code on my Dacor oven to clear it?
Resetting the oven by cutting power at the breaker for a few minutes may temporarily clear the F2 code, but it will return if the underlying problem is not repaired. A stuck relay or failed sensor will continue to cause runaway heating, so the fault will reappear the next time the oven is used. A reset is useful for confirming whether the fault is intermittent, but it is not a fix.
Is it safe to use my Dacor oven while the F2 code is active?
No, the oven should not be used while F2 is present. This code indicates the oven could not control its own heating, which is a safety risk. Continuing to operate the appliance before identifying and correcting the cause could result in overheating, element or cavity damage, or a more serious hazard.
How do I fix the F2 error code on a Dacor oven?
Start by checking the relay on the ERC for any sign of being stuck in the closed position. If the relay is functioning correctly, test the oven temperature sensor resistance and inspect the full wiring harness from the sensor to the control board for damage or loose connections. Depending on which component has failed, the repair will involve replacing the sensor, the wiring harness, or the control board.
How much does it cost to repair a Dacor F2 error code?
Repair costs vary depending on the failed component. An oven temperature sensor typically runs between $30 and $80 for the part. A replacement ERC or control board is considerably more expensive, often ranging from $150 to $400 or higher depending on the model. Adding professional labor will increase the total cost, generally by $100 to $200 or more depending on the technician and region.

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