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Error code reference

Bosch Refrigerator Error Code F11

Compartment sensor in the freezer compartment is interrupted (open circuit).

Bosch codesBosch refrigerator codes

Compartment sensor in the freezer compartment is interrupted (open circuit).

First step from the service manual

Check the sensor and the supply cable to the electronics module.

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

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What F11 means on a Bosch refrigerator

The F11 error code on a Bosch refrigerator indicates an open circuit condition in the freezer compartment temperature sensor, also called the compartment sensor. This sensor is a negative temperature coefficient (NTC) thermistor that continuously feeds temperature data to the electronics module, allowing the control board to regulate compressor cycles and maintain the target freezer temperature. When the circuit is open, the electronics module receives no signal from the sensor, and the system cannot determine the actual temperature inside the freezer compartment.

An open circuit in this context means the electrical path between the sensor and the electronics module has been broken completely. This differs from a short circuit, where resistance drops to near zero. With an open circuit, resistance is effectively infinite, meaning no current flows through the signal wire. The electronics module detects this absence of a valid resistance reading and triggers the F11 fault to alert the technician that sensor data is unavailable.

The most likely causes are a physically damaged or disconnected wiring harness between the sensor and the control board, a failed sensor element itself, or a corroded or loose connector at either end of the supply cable. Ice buildup in the freezer compartment can sometimes stress or sever wiring. The first diagnostic step is to inspect the sensor body and trace the supply cable from the sensor back to the electronics module, checking all connectors and the wire insulation for damage or separation.

Source: manufacturer service documentation.

Common causes of F11

  1. 01

    Disconnected or loose wiring connector

    Wiring / connection

    The connector joining the sensor's supply cable to the electronics module may have worked loose over time or been accidentally dislodged. Inspect both ends of the cable for a connector that is not fully seated.

  2. 02

    Broken or damaged supply cable

    Part replacement

    The wiring harness running from the freezer sensor to the electronics module can develop a break in the conductor due to repeated door vibration, ice pressure, or pinching during reassembly. Visually trace the entire cable length and flex it gently to locate any break.

  3. 03

    Failed freezer compartment sensor

    Part replacement

    The NTC thermistor element inside the sensor can fail in an open state, meaning the sensor itself no longer conducts. A multimeter resistance check across the sensor terminals will show an out-of-range or infinite reading if the sensor has failed.

  4. 04

    Corroded or oxidized connector terminals

    Wiring / connection

    Moisture inside the freezer compartment can cause corrosion on the sensor connector pins, increasing resistance to the point of an effective open circuit. Look for green or white oxidation on the terminals and clean or replace the connector as needed.

  5. 05

    Faulty electronics module

    Part replacement

    In rare cases, the input circuit on the electronics module that reads the sensor signal can fail, causing the board to report an open circuit even when the sensor and wiring are intact. This should only be suspected after the sensor and all wiring have been confirmed good.

See the test procedure for each cause

Frequently asked questions about F11

What does F11 mean on a Bosch refrigerator?
F11 on a Bosch refrigerator means the freezer compartment temperature sensor has an open circuit, so the electronics module is receiving no signal from it. The control board cannot read the freezer temperature and triggers this fault as a result. The problem lies somewhere along the sensor itself or the supply cable connecting it to the electronics module.
Can I fix the F11 error myself?
A knowledgeable DIYer can attempt to diagnose this code by inspecting the wiring harness and connectors for visible damage or loose connections. Reconnecting a dislodged connector or cleaning corroded terminals requires no special tools. However, if the sensor itself or the wiring harness needs replacement, or if the electronics module is suspected, professional service is recommended to ensure correct component sourcing and installation.
Is it safe to keep using my Bosch refrigerator while the F11 code is active?
With an active F11 fault, the refrigerator's control system cannot accurately regulate the freezer temperature, which means food safety is at risk. The freezer may run continuously, not enough, or erratically depending on how the control board handles a missing sensor signal. It is best to transfer frozen food to another unit and address the fault promptly.
How much does it cost to repair an F11 error on a Bosch refrigerator?
If only a connector needs reseating or cleaning, there may be no parts cost involved, with any expense limited to a service call fee typically in the range of $75 to $150. Replacing the freezer compartment sensor generally costs between $20 and $80 for the part, plus labor. If the electronics module requires replacement, total repair costs can range from $200 to $500 or more depending on the specific model and local labor rates.
Will resetting the refrigerator clear the F11 code?
A power reset by unplugging the refrigerator for a few minutes may temporarily clear the F11 code from the display, but the fault will return as soon as the electronics module attempts to read the sensor again and detects the open circuit. A reset does not fix the underlying wiring or sensor problem. The code will only be permanently cleared once the broken circuit is repaired.

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