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Error code reference

Jenn-Air Oven Error Code F1EA-2

Main ACU over temperature

Jenn-Air codesJenn-Air oven codes

Main ACU over temperature — ACU Temp sensor shorted.

First step from the service manual

Unplug range or disconnect power. Inspect connections to main control for loose/unplugged connectors.

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

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What F1EA-2 means on a Jenn-Air oven

The F1EA-2 error code on a Jenn-Air oven indicates that the main ACU (Appliance Control Unit) has detected an over-temperature condition caused by a shorted ACU temperature sensor. The ACU is the primary control board that manages all oven functions, and it contains an internal or closely associated temperature sensor used to monitor the board's own operating temperature. When that sensor shorts, it sends an abnormal signal to the control, causing the board to register a falsely extreme temperature reading and trigger this fault code.

A shorted sensor typically occurs when the sensor's internal resistance drops abnormally low, collapsing the voltage signal that the ACU uses to interpret temperature. This can result from a damaged sensor element, compromised wiring insulation causing a short to ground, or a failed connector that allows two conductors to contact each other. Unlike an open-circuit fault, a shorted sensor actively drives the signal in the wrong direction, which is why the control interprets it as an over-temperature event rather than simply a missing signal.

The first step in diagnosing this fault is to disconnect power to the range and carefully inspect all wiring harness connectors leading to the main control board. Loose, unseated, or partially unplugged connectors can cause intermittent shorts and erratic sensor readings. If all connections appear secure and undamaged, the fault likely points to either the sensor itself or the ACU board, both of which require further resistance and voltage testing to isolate.

Source: manufacturer service documentation.

Common causes of F1EA-2

  1. 01

    Shorted ACU temperature sensor

    Part replacement

    The temperature sensor monitoring the control board itself has failed internally, causing its resistance to drop and sending an abnormal signal to the ACU. This is the most direct cause indicated by the fault code and typically requires replacing the sensor or the ACU assembly.

  2. 02

    Loose or unseated wiring connector at the ACU

    Wiring / connection

    A partially unplugged or loose connector at the main control board can cause intermittent shorts and trigger false sensor readings. Inspecting and firmly reseating all harness connectors at the ACU is the recommended first diagnostic step after removing power.

  3. 03

    Damaged wiring harness with short to ground

    Part replacement

    Chafed, pinched, or heat-damaged insulation along the sensor wiring harness can allow conductors to contact the oven chassis or each other, creating a short circuit. Visually trace the harness from the sensor to the control board looking for damaged insulation or burn marks.

  4. 04

    Failed main ACU control board

    Part replacement

    If the sensor and wiring check out without visible faults, the ACU board itself may have an internal failure affecting how it reads the sensor circuit. A failed input circuit on the board can register a shorted condition even when the external sensor is functional.

See the test procedure for each cause

Frequently asked questions about F1EA-2

What does F1EA-2 mean on a Jenn-Air oven?
F1EA-2 indicates that the main ACU (Appliance Control Unit) has detected an over-temperature condition due to a shorted ACU temperature sensor. The control board monitors its own operating temperature through a dedicated sensor, and when that sensor shorts, the board triggers this fault to protect itself. The oven will not function normally while this code is active. Diagnosing it requires checking wiring connections at the control board and testing the sensor circuit.
Can I fix F1EA-2 myself, or do I need a technician?
Some cases of F1EA-2 can be resolved by a confident DIYer by unplugging the oven, inspecting all connectors at the main control board, and reseating any that appear loose or unseated. However, if the fault persists after checking connections, further diagnosis requires testing sensor resistance and voltage, which involves working near the control board and wiring. If component replacement is needed, a qualified appliance repair technician is recommended to ensure correct part selection and safe installation.
Is it safe to use my Jenn-Air oven when F1EA-2 is displayed?
It is not recommended to continue using the oven while F1EA-2 is active. This code indicates a fault in the control board's own temperature monitoring circuit, and operating the oven with a compromised control system could lead to unpredictable behavior. Disconnect power to the range and have the fault diagnosed before resuming normal use.
Will resetting the oven clear the F1EA-2 error code?
Unplugging the oven or disconnecting power at the breaker may temporarily clear the code, but if the underlying fault with the sensor or wiring remains, F1EA-2 will return once power is restored and the control runs its diagnostics. A reset alone is not a repair. The root cause, whether a shorted sensor, damaged wiring, or a failed ACU board, must be identified and corrected to permanently resolve the fault.
How much does it cost to repair a Jenn-Air oven showing F1EA-2?
Repair costs vary depending on the root cause. If the fix is simply reseating a loose connector, there may be no parts cost, though a service call fee typically applies if a technician is involved. Replacement of a wiring harness or temperature sensor generally falls in the range of $50 to $150 for parts. If the main ACU control board requires replacement, parts alone can range from $150 to $400 or more, with additional labor costs on top.

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