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Error code reference

Bosch Range Error Code F2

Oven sensor not reading correct resistance during test/use.

Bosch codesBosch range codes

Oven sensor not reading correct resistance during test/use.

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What F2 means on a Bosch range

The F2 error code on a Bosch range indicates that the oven temperature sensor is producing a resistance reading outside the acceptable range during a self-test or active use cycle. The oven sensor, also called an RTD (resistance temperature detector) or thermistor, works by changing its electrical resistance in direct proportion to temperature. The control board continuously monitors this resistance to calculate the actual oven cavity temperature. When the sensor returns a value that falls outside the expected parameters, either too high or too low, the board interprets this as a fault and triggers the F2 code.

The most common causes of this fault are a failed oven sensor element, a short or open circuit in the sensor wiring harness, or corroded and loose connections at the sensor or control board terminals. In some cases, the sensor itself may have been physically damaged by high heat events or grease buildup. The resistance of a healthy Bosch oven sensor typically reads around 1080 to 1100 ohms at room temperature, and a reading significantly above or below this range confirms sensor failure.

The control board itself is a less common but possible culprit. If the sensor and wiring both test within spec using a multimeter and the F2 code persists, the board may have a defective input circuit for the sensor signal. Proper diagnosis requires isolating each component using resistance and continuity tests before any parts are replaced.

Source: manufacturer service documentation.

Common causes of F2

  1. 01

    Failed oven temperature sensor

    Part replacement

    The sensor element itself has failed, producing an incorrect resistance reading. Testing the sensor with a multimeter at room temperature should show approximately 1080 to 1100 ohms; a reading far outside this range confirms the sensor needs replacement.

  2. 02

    Damaged or broken sensor wiring harness

    Part replacement

    The wires connecting the oven sensor to the control board can crack, fray, or short due to repeated heat cycling. Inspect the full length of the harness for visible damage, melting, or breaks and check for continuity.

  3. 03

    Loose or corroded sensor connections

    Wiring / connection

    Poor contact at the sensor connector or at the control board terminal can cause intermittent or incorrect resistance readings. Disconnecting and reseating the connectors, and cleaning any corrosion with electrical contact cleaner, may resolve the fault.

  4. 04

    Sensor physically damaged by high heat or grease

    Part replacement

    Excessive heat events or grease accumulation around the sensor probe can degrade the sensor element. Visually inspect the sensor inside the oven cavity for signs of discoloration, cracking, or debris buildup.

  5. 05

    Faulty control board sensor input circuit

    Part replacement

    If the sensor and all wiring test within specification but the F2 code remains, the control board may have a defective circuit for processing the sensor signal. This is the least common cause and should only be considered after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about F2

What does F2 mean on a Bosch range?
The F2 code on a Bosch range means the oven temperature sensor is producing a resistance reading outside the acceptable range during a test or while the oven is in use. The control board monitors the sensor continuously to regulate oven temperature, and this code appears when the sensor signal falls outside expected parameters. The fault typically points to a defective sensor, damaged wiring, or a loose connection.
Can I fix the F2 error on my Bosch range myself?
A knowledgeable DIYer can often diagnose and repair an F2 error by testing the oven sensor with a multimeter and replacing it if the resistance reading is out of spec. Checking and reseating wiring connections is also a straightforward task. However, if the control board is at fault, replacement is more involved and some technicians prefer to have a professional handle that repair.
Is it safe to use my Bosch range while the F2 code is displayed?
It is not recommended to use the oven while the F2 code is active. Because the sensor is not reading correctly, the control board cannot accurately regulate oven temperature, which could result in significant overheating or insufficient heat. The cooktop burners may still function normally, but the oven should not be used until the fault is resolved.
How much does it cost to fix a Bosch range F2 error?
If the repair requires only a new oven temperature sensor, parts typically cost in the range of $20 to $60 depending on the specific model. Professional labor to diagnose and replace the sensor generally adds $100 to $200 or more. If the control board needs replacement, the total repair cost can range from $200 to $500 or higher depending on parts and labor rates in your area.
Will resetting my Bosch range clear the F2 error code?
Resetting the range by cutting power at the breaker for a few minutes may temporarily clear the F2 code, but the error will return if the underlying problem is not fixed. A reset does not repair a failed sensor or damaged wiring. Persistent or recurring F2 codes require proper diagnosis and component repair or replacement to resolve the fault permanently.

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