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Error code reference

Jenn-Air Range Error Code F4

Oven temperature sensor

Jenn-Air codesJenn-Air range codes

Oven temperature sensor - open circuit.

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What F4 means on a Jenn-Air range

The F4 error code on a Jenn-Air range indicates an open circuit condition in the oven temperature sensor circuit. The oven temperature sensor, also called an RTD (resistance temperature detector), is a probe mounted inside the oven cavity that continuously reports temperature data to the electronic oven control board. Under normal operation, the sensor changes its electrical resistance in proportion to temperature, allowing the control board to regulate heating elements accurately. An open circuit means the electrical path through the sensor or its wiring has been completely broken, and no signal is reaching the control board.

The most common cause of this fault is a failed oven temperature sensor. These sensors can degrade over time due to repeated high-heat cycles, and the internal resistive element can fracture or burn out, creating an open circuit. A properly functioning oven temperature sensor typically reads around 1080 to 1100 ohms at room temperature. A reading of infinite resistance (OL on a multimeter) confirms an open circuit within the sensor itself.

Beyond sensor failure, the wiring harness connecting the sensor to the control board is also a frequent culprit. The wire leads and connectors at both the sensor end and the control board end can suffer from heat damage, corrosion, or physical breaks that interrupt continuity. In less common cases, a damaged control board connector or the board itself may be responsible if the wiring and sensor both test within acceptable ranges.

Source: manufacturer service documentation.

Common causes of F4

  1. 01

    Failed oven temperature sensor

    Part replacement

    The sensor's internal resistive element has burned out or fractured, creating an open circuit. Testing the sensor with a multimeter will show infinite resistance rather than the expected value near 1080 to 1100 ohms at room temperature.

  2. 02

    Broken or damaged wiring harness

    Part replacement

    The wires running from the sensor probe to the control board can crack, burn, or break, especially near the oven cavity wall where heat is most intense. A visual inspection and continuity test of the wiring will reveal any breaks.

  3. 03

    Loose or corroded connector

    Wiring / connection

    The connector at either the sensor end or the control board end can work loose or corrode over time, interrupting the circuit without fully breaking any wires. Unplugging and reseating the connectors may resolve the fault if corrosion is minimal.

  4. 04

    Damaged control board input

    Part replacement

    If the sensor and all wiring test correctly, the control board's sensor input circuit may be damaged. This is the least common cause and is typically diagnosed only after ruling out the sensor and wiring.

See the test procedure for each cause

Frequently asked questions about F4

What does F4 mean on a Jenn-Air range?
The F4 code on a Jenn-Air range signals an open circuit in the oven temperature sensor circuit. This means the control board is receiving no electrical signal from the sensor probe inside the oven cavity. The range will not operate properly until the fault is diagnosed and repaired. The cause is usually a failed sensor or damaged wiring.
Can I reset the F4 code to clear it?
You can attempt to clear the F4 code by disconnecting the range from power for several minutes and then restoring power. However, if the underlying open circuit condition still exists, the code will return immediately or as soon as the oven is used. A reset is useful for confirming whether a fault is intermittent, but it is not a fix for a failed sensor or broken wire.
Is it safe to use my Jenn-Air range when the F4 code is displayed?
You should avoid using the oven when the F4 code is active. Without a functioning temperature sensor, the control board cannot monitor or regulate oven temperature, which creates a risk of overheating. Surface burners on a gas or dual-fuel range may still operate, but the oven itself should not be used until the repair is complete.
How do I fix the F4 error on a Jenn-Air range?
Start by testing the oven temperature sensor with a multimeter. Disconnect the sensor and measure its resistance at room temperature. A reading near 1080 to 1100 ohms indicates a good sensor, while infinite resistance confirms the sensor has failed and needs replacement. If the sensor tests correctly, inspect and test the wiring harness and connectors between the sensor and the control board for continuity and visible damage.
How much does it cost to repair a Jenn-Air range F4 error?
Repair costs vary depending on the failed component. A replacement oven temperature sensor typically costs between $20 and $75 for the part alone. If a professional technician performs the repair, labor charges will add to that cost, generally bringing the total into the $100 to $250 range. A control board replacement, if needed, is significantly more expensive and can push the total repair cost higher.

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