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Error code reference

Amana Oven Error Code F3

Open sensor or sensor circuit (resistance >3000 ohms).

Amana codesAmana oven codes

Open sensor or sensor circuit (resistance >3000 ohms).

First step from the service manual

Check sensor resistance and wiring.

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

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What F3 means on a Amana oven

The F3 error code on an Amana oven indicates an open sensor or sensor circuit, specifically when the oven temperature sensor's resistance measures above 3000 ohms. The oven temperature sensor is a resistive temperature device (RTD) that changes resistance in proportion to temperature. Under normal operating conditions, the sensor reads within a predictable resistance range that the control board uses to monitor and regulate oven temperature. When resistance climbs above 3000 ohms, the control board interprets this as a broken or open circuit and triggers the F3 fault.

The most common root cause is a failed oven temperature sensor, where the internal resistive element has broken, causing resistance to spike or go infinite. However, the fault can also originate in the wiring harness connecting the sensor to the control board. Damaged insulation, a loose connector, or a corroded terminal can all interrupt the circuit and produce the same high-resistance reading without the sensor itself being defective.

Diagnosis begins with measuring resistance across the sensor's terminals using a multimeter. A functional sensor typically reads around 1000 to 1100 ohms at room temperature. Any reading significantly above this range, especially above 3000 ohms, confirms an open sensor or circuit fault. Technicians should also inspect the full wire harness from the sensor to the control board for pinched wires, burned sections near the oven cavity, or loose connectors before condemning the sensor or the control board.

Source: manufacturer service documentation.

Common causes of F3

  1. 01

    Failed oven temperature sensor

    Part replacement

    The resistive element inside the sensor has broken open, causing resistance to exceed 3000 ohms. Confirm by measuring resistance across the sensor terminals at room temperature; a reading well above 1000 to 1100 ohms indicates a defective sensor.

  2. 02

    Damaged or broken wiring harness

    Part replacement

    Wires running from the sensor through the oven cavity to the control board can become pinched, burned, or brittle over time. Visually inspect the harness for any scorched, frayed, or disconnected sections and test continuity along each wire.

  3. 03

    Loose or corroded sensor connector

    Wiring / connection

    The connector where the sensor plugs into the harness can work loose or develop corrosion, interrupting the circuit. Disconnect and reseat the connector, inspecting the terminals for oxidation or bent pins.

  4. 04

    Faulty control board

    Part replacement

    If the sensor and wiring both test within spec, the control board's sensor input circuit may have failed. This is less common and should only be considered after the sensor and harness have been confirmed to be in good condition.

See the test procedure for each cause

Frequently asked questions about F3

What does F3 mean on a Amana oven?
F3 on an Amana oven indicates an open temperature sensor or sensor circuit, meaning the control board is reading a resistance above 3000 ohms from the oven temperature sensor. This prevents the oven from accurately monitoring internal temperature, so it shuts down as a safety measure. The fault points to either a failed sensor, a wiring issue, or a loose connection in the sensor circuit.
Can I fix an F3 error on my Amana oven myself?
Many homeowners and DIYers can resolve F3 by replacing the oven temperature sensor, which is a straightforward repair requiring a screwdriver and a multimeter to confirm the diagnosis. Start by measuring the sensor resistance at room temperature; if it reads significantly above 1000 to 1100 ohms, the sensor needs to be replaced. Also check that all connectors in the sensor wiring harness are fully seated before ordering parts.
Is it safe to use my Amana oven while it shows F3?
No, you should not attempt to use the oven while the F3 code is active. Because the control board cannot accurately read the oven's internal temperature, it cannot regulate heat properly, which creates a risk of overheating. The oven should remain out of service until the sensor or wiring fault is diagnosed and repaired.
How much does it cost to repair an F3 error on an Amana oven?
If the problem is a failed oven temperature sensor, the part typically costs in the range of $15 to $50 depending on the model, making it one of the more affordable oven repairs. If the wiring harness needs replacement or the issue turns out to be a faulty control board, costs can rise to the range of $150 to $400 or more including labor. Getting a resistance reading on the sensor before ordering parts helps avoid unnecessary expenses.
Will resetting my Amana oven clear the F3 error code?
Resetting the oven by cutting power at the breaker for a few minutes may temporarily clear the F3 code, but it will return as soon as the control board detects the out-of-range resistance again. A reset does not fix the underlying fault in the sensor or wiring. The code will keep reappearing until the defective component is identified and replaced.

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