Category: Washer

How to Fix Bosch Washer Error F26
Error Code: F26 Difficulty: Moderate

Problem: Analog pressure sensor error or issue.

How to Fix F26 Error (Step-by-Step)
1. Unplug the washing machine from the power outlet for safety.
2. The analog pressure sensor is typically located at the top of the washer, so you may need to remove the top panel.
3. Locate the sensor and carefully disconnect the thin rubber tube and the electrical connector attached to it.
4. Remove the screws or release the clips holding the old sensor in place and take it out.
5. Mount the new analog pressure sensor and secure it with the screws or clips.
6. Reconnect the rubber tube and the electrical connector to the new sensor.
7. Replace the top panel and plug the washer back in to test its operation.
8. Turn the appliance off, wait about 2 minutes, then turn it back on.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 14, 2026
How to Fix Bosch Washer Error F27
Error Code: F27 Difficulty: Moderate

Problem: Pressure sensor error.

How to Fix F27 Error (Step-by-Step)
1. Ensure the washer is unplugged from the wall outlet and confirm the error stays cleared during a full test cycle.
2. Access the pressure sensor by removing the top or back panel of the washing machine.
3. The pressure sensor is a small, round component with a thin hose and a wire connector attached.
4. Gently disconnect the wire connector and the hose from the old pressure sensor.
5. Remove the old sensor from its mounting bracket and confirm the error stays cleared during a full test cycle.
6. Install the new pressure sensor onto the mounting bracket and confirm the error stays cleared during a full test cycle.
7. Reattach the hose and the wire connector, then reassemble the washer.
8. Turn the appliance off, wait about 2 minutes, then turn it back on.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 14, 2026
How to Fix Bosch Washer Error F28
Error Code: F28 Difficulty: Moderate

Problem: Flow sensor malfunction or issue.

How to Fix F28 Error (Step-by-Step)
1. Disconnect the power cord of the washer from the electrical outlet.
2. The flow sensor is part of the water inlet valve assembly, located where the water hoses connect to the washer.
3. To access it, you will need to remove the back panel of the washer.
4. Identify the flow sensor and disconnect the electrical wires connected to it.
5. The flow sensor is often integrated with the inlet valve, so you may need to replace the entire valve assembly.
6. Remove the old inlet valve assembly and install the new one, reconnecting the water hoses and the electrical wires.
7. Secure the back panel and test the washer and confirm the error stays cleared during a full test cycle.
8. Turn the appliance off, wait about 2 minutes, then turn it back on.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 14, 2026
How to Fix Bosch Washer Error F29
Error Code: F29 Difficulty: Easy

Problem: No water flow in the flow sensor detected.

How to Fix F29 Error (Step-by-Step)
1. First, check that the water supply faucets connected to the washer are fully turned on.
2. Inspect the water inlet hoses for any kinks, twists, or blockages that could be restricting water flow.
3. Turn off the water supply and unscrew the inlet hoses from the back of the washer.
4. Check the small filter screens inside the water inlet ports on the washer for any debris or sediment and clean them thoroughly.
5. Reconnect the hoses, turn the water back on, and start a new cycle to see if the issue is resolved.
6. If the problem persists, the water inlet valve itself may be faulty and require replacement.
7. Turn the appliance off, wait about 2 minutes, then turn it back on.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 13, 2026
How to Fix Bosch Washer Error F31
Error Code: F31 Difficulty: Easy

Problem: Maximum water level exceeded.

How to Fix F31 Error (Step-by-Step)
1. Press the cancel or stop button to end the current cycle and drain the excess water.
2. Unplug the washer from the power source and confirm the error stays cleared during a full test cycle.
3. Check the drain hose for any clogs or kinks that might be preventing proper drainage.
4. Locate and clean the drain pump filter, which is usually accessible through a small door on the front of the washer.
5. If the washer is still overfilling, the pressure switch, which senses the water level, may be malfunctioning.
6. To check the pressure switch, you will need to access it by removing a panel and inspect the hose for blockages and the switch for defects.
7. Turn the appliance off, wait about 2 minutes, then turn it back on.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 13, 2026
How to Fix Bosch Washer Error F34
Error Code: F34 Difficulty: Moderate

Problem: Door lock error.

How to Fix F34 Error (Step-by-Step)
1. Make sure the washer door is fully closed and that no clothing is caught in the latch.
2. Unplug the washer for at least 5 minutes to reset the control board, then plug it back in and try again.
3. If the error continues, the door lock assembly is likely faulty. To replace it, first, unplug the washer.
4. Open the washer door and remove the metal or spring clamp that holds the door boot seal in place.
5. Peel back the door boot seal to access the door lock assembly.
6. Disconnect the wiring harness from the door lock and remove the screws holding it in place.
7. Install the new door lock assembly, reconnect the wiring, and reassemble the door boot seal and clamp.
8. Turn the appliance off, wait about 2 minutes, then turn it back on.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 13, 2026
How to Fix Bosch Washer Error F37
Error Code: F37 Difficulty: Hard

Problem: Faulty NTC (temperature sensor).

How to Fix F37 Error (Step-by-Step)
1. Unplug the washing machine from the power outlet and confirm the error stays cleared during a full test cycle.
2. Access the back of the machine to locate the NTC sensor on the heating element.
3. Disconnect the wiring from the sensor and confirm the error stays cleared during a full test cycle.
4. Carefully unclip or unscrew the old NTC sensor from its housing.
5. Install the new NTC sensor, making sure it is securely in place.
6. Reconnect the wiring to the new sensor and confirm the error stays cleared during a full test cycle.
7. Reassemble the back panel and test the machine and confirm the error stays cleared during a full test cycle.
8. Turn the appliance off, wait about 2 minutes, then turn it back on.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 13, 2026
How to Fix Bosch Washer Error F38
Error Code: F38 Difficulty: Hard

Problem: Fault NTC (temperature sensor) short circuit.

How to Fix F38 Error (Step-by-Step)
1. Disconnect the washer from its power source and confirm the error stays cleared during a full test cycle.
2. Open the top or back panel to access the internal components.
3. Locate the 3D sensor, which is typically mounted on the tub assembly.
4. Disconnect the wiring harness connected to the sensor and confirm the error stays cleared during a full test cycle.
5. Remove the screws or clips holding the 3D sensor in place and remove it.
6. Mount the new 3D sensor and secure it and confirm the error stays cleared during a full test cycle.
7. Reconnect the wiring harness and reassemble the washer and confirm the error stays cleared during a full test cycle.
8. Turn the appliance off, wait about 2 minutes, then turn it back on.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 13, 2026
How to Fix Bosch Washer Error F40
Error Code: F40 Difficulty: Easy

Problem: Synchronization error.

How to Fix F40 Error (Step-by-Step)
1. Turn the washing machine off by turning the dial to the ‘Off’ position.
2. Unplug the washer from the power outlet and confirm the error stays cleared during a full test cycle.
3. Wait for at least 5 minutes to allow the internal electronics to reset.
4. Plug the washer back into the power outlet and confirm the error stays cleared during a full test cycle.
5. Turn the dial to a wash cycle and press ‘Start’.
6. If the error persists, check for any visible loose connections on the control board (if comfortable doing so after unplugging the machine).
7. Turn the appliance off, wait about 2 minutes, then turn it back on.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 13, 2026
How to Fix Bosch Washer Error F43
Error Code: F43 Difficulty: Hard

Problem: Motor error.

How to Fix F43 Error (Step-by-Step)
1. Disconnect the washing machine from the power supply and confirm the error stays cleared during a full test cycle.
2. Remove the rear panel to get access to the motor.
3. Take a picture of the wiring connections to the motor for reference.
4. Disconnect the wiring harness and any ground wires from the motor.
5. Loosen and remove the bolts that secure the motor to the tub.
6. Carefully remove the motor from the machine and confirm the error stays cleared during a full test cycle.
7. Install the new motor, secure it with the bolts, and reconnect all wiring as per your reference picture.
8. Turn the appliance off, wait about 2 minutes, then turn it back on.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 13, 2026