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Error code reference

Jenn-Air Oven Error Code FR

Second oven error sensed (double oven only).

Jenn-Air codesJenn-Air oven codes

Second oven error sensed (double oven only).

First step from the service manual

Check sensor and harness. Replace second oven board.

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

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What FR means on a Jenn-Air oven

The FR error code on a Jenn-Air double oven indicates the main control board has detected a fault signal originating from the second oven's sensor circuit. Specifically, the control is reading an abnormal condition from the temperature sensor (also called the oven temperature sensor probe) or the wiring harness connecting that sensor to the secondary oven control board. The code will not appear on single-oven models since it is exclusive to double oven configurations where the upper and lower cavities each maintain independent control circuits. Diagnosis begins at the sensor and harness before condemning the second oven board itself.

In plain terms, your oven has two separate cooking cavities, and the electronics monitoring the lower (or second) oven have detected something wrong with how temperature is being read or reported. This could be a loose wire, a damaged sensor probe, or a failed control board specific to the second oven. The oven is alerting you that it cannot reliably monitor or regulate heat in that cavity, which is why it stops operating normally and displays FR instead.

Source: manufacturer service documentation.

Common causes of FR

  1. 01

    Failed second oven temperature sensor

    Part replacement

    The temperature sensor probe in the second oven cavity can fail open or short, sending an out-of-range resistance value to the control board. This causes the board to immediately flag an FR fault since it cannot get a valid temperature reading.

  2. 02

    Damaged or disconnected wiring harness

    Wiring / connection

    The harness running between the second oven temperature sensor and the secondary control board can develop broken wires, burnt connectors, or loose terminals, especially near the oven door hinge area where flex and heat stress are highest. A break anywhere in this circuit produces the same error as a failed sensor.

  3. 03

    Faulty second oven control board

    Part replacement

    If the sensor and harness both test within spec, the secondary oven control board itself is likely defective. A failed board cannot correctly process sensor signals and will generate a persistent FR error that does not clear after sensor and harness repairs.

  4. 04

    Poor connection at sensor plug or board connector

    Wiring / connection

    Corrosion or a partially seated connector at either the sensor plug or the board terminal can intermittently disrupt the sensor circuit without fully breaking the wire, causing the FR code to appear and disappear unpredictably.

See the test procedure for each cause

Frequently asked questions about FR

What does the FR error code mean on a Jenn-Air double oven?
FR indicates the control system has sensed a fault in the second oven's temperature monitoring circuit. This is specific to Jenn-Air double oven models and points to a problem with the second oven temperature sensor, its wiring harness, or the secondary oven control board. The first oven cavity may still function normally while this code is active.
Is it safe to use my Jenn-Air oven when the FR code is displayed?
The second oven cavity should not be used while the FR code is active because the control system cannot accurately monitor or regulate its temperature, which creates a risk of overheating or undercooked food. The primary (first) oven cavity may remain operational, but verify it is functioning correctly before relying on it. Do not attempt to bypass the error and run the second oven until the fault is diagnosed and repaired.
How do I fix the FR error code on my Jenn-Air oven?
Start by inspecting the wiring harness connected to the second oven temperature sensor for any visible damage, burnt spots, or loose connectors, and reseat all plugs firmly. Next, test the temperature sensor's resistance with a multimeter (most oven sensors read approximately 1080 to 1090 ohms at room temperature) and replace the sensor if it reads open or significantly out of range. If the harness and sensor both check out, the second oven control board will need to be replaced.
How much does it cost to repair the FR error code on a Jenn-Air double oven?
A replacement oven temperature sensor typically costs between $20 and $60 for the part and is a manageable DIY repair. A second oven control board is the more expensive fix, with parts commonly ranging from $100 to $300 or more depending on the model. Professional labor adds $100 to $200 per service visit. Diagnosing the harness and sensor yourself before calling a technician can save significant cost if the fix turns out to be a simple sensor swap.
Can I reset the FR code on a Jenn-Air oven by cycling the power?
Power cycling the oven by turning off the circuit breaker for 30 seconds and restoring power may temporarily clear the FR display, but the code will return if the underlying fault in the second oven sensor circuit is still present. A persistent or recurring FR code requires physical inspection and testing of the sensor, harness, and secondary control board rather than repeated resets.

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