Author: ApplianceFixGuide Team

How to Fix Bosch Washer Error F19
Error Code: F19 Difficulty: Hard

Problem: Water heating time exceeded.

How to Fix F19 Error (Step-by-Step)
1. Unplug the washing machine from the electrical outlet and confirm the error stays cleared during a full test cycle.
2. Remove the back panel of the washer to access the heating element, which is located at the bottom of the tub.
3. Disconnect the wires from the heating element terminals and confirm the error stays cleared during a full test cycle.
4. Loosen the nut that secures the heating element in place, but do not remove it completely.
5. Gently pry the old heating element out of the tub. This may require some force if it is sealed tightly.
6. Insert the new heating element into the tub, ensuring the rubber seal is properly seated. Tighten the retaining nut and reconnect the wires.
7. Reattach the back panel, plug in the washer, and run a hot water cycle to test the new element.
8. Turn the appliance off, wait about 2 minutes, then turn it back on.
Verified Compatible Alternatives:
- Heating Element
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 15, 2026
How to Fix Bosch Washer Error F20
Error Code: F20 Difficulty: Hard

Problem: Unexpected heating during the cycle.

How to Fix F20 Error (Step-by-Step)
1. Disconnect the washer from its power source and confirm the error stays cleared during a full test cycle.
2. Access the main control board, which is typically located behind the control panel or in the top section of the machine.
3. Locate the heating element relay on the control board. It is a small, often black, rectangular component.
4. Carefully desolder the old relay from the control board using a soldering iron and desoldering pump or wick.
5. Solder the new heating element relay onto the control board, ensuring all connections are secure.
6. Reinstall the control board and any panels that were removed.
7. Reconnect the power and run a cycle to ensure the heating issue is resolved.
8. Turn the appliance off, wait about 2 minutes, then turn it back on.
Verified Compatible Alternatives:
- Heating Element Relay
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 15, 2026
How to Fix Bosch Washer Error F21
Error Code: F21 Difficulty: Hard

Problem: Uneven drum rotation, engine problems, or a faulty tacho generator.

How to Fix F21 Error (Step-by-Step)
1. Unplug the washer from the power source and confirm the error stays cleared during a full test cycle.
2. Remove the back panel to get access to the motor.
3. Locate the carbon brushes on the motor. They are spring-loaded and make contact with the commutator.
4. Disconnect the electrical wires attached to the brushes and remove the screws holding them in place.
5. Slide the old brushes out and insert the new ones, making sure they are oriented correctly.
6. Secure the new brushes with the screws and reattach the electrical wires.
7. Replace the back panel, plug in the washer, and run a spin cycle to test the motor.
8. Turn the appliance off, wait about 2 minutes, then turn it back on.
Verified Compatible Alternatives:
- Motor Control Board
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
April 15, 2026
How to Fix Bosch Washer Error F22
Error Code: F22 Difficulty: Moderate

Problem: NTC sensor malfunction.

How to Fix F22 Error (Step-by-Step)
1. Ensure the washing machine is unplugged from the power outlet.
2. Access the back of the washer and locate the NTC sensor, which is usually inserted into the heating element at the base of the drum.
3. Disconnect the wiring connector from the sensor and confirm the error stays cleared during a full test cycle.
4. Carefully pull the old NTC sensor out of its housing. It may be held in by a clip or a tight-fitting rubber grommet.
5. Insert the new NTC sensor firmly into the same position.
6. Reconnect the wiring harness to the new sensor and confirm the error stays cleared during a full test cycle.
7. Reassemble any panels that were removed, plug the washer back in, and run a wash cycle to check if the error is cleared.
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 F23
Error Code: F23 Difficulty: Hard

Problem: Aquastop activated; indicates a leak.

How to Fix F23 Error (Step-by-Step)
1. Turn off the water supply and unplug the washer from the electrical outlet to ensure safety.
2. Carefully pull the washer away from the wall to access the back panel and water connections.
3. Locate the Aquastop valve, which is the blue or grey box attached directly to the water faucet.
4. Inspect the hose and the Aquastop valve for any visible signs of leaks, cracks, or damage.
5. If a leak is confirmed, the entire Aquastop hose and valve assembly needs to be replaced as it is a single sealed unit.
6. Unscrew the old Aquastop valve from the faucet and detach the other end of the hose from the washer’s water inlet valve.
7. Install the new Aquastop hose and valve, ensuring all connections are tight to prevent further leaks.
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 F25
Error Code: F25 Difficulty: Moderate

Problem: Turbidity sensor malfunction or issue.

How to Fix F25 Error (Step-by-Step)
1. Disconnect the washer from the power source to prevent any electrical accidents.
2. To access the turbidity sensor, you will likely need to remove the front or back panel of the washer.
3. The turbidity sensor is usually located in the sump area at the bottom of the tub.
4. Carefully disconnect the wiring harness attached to the sensor and confirm the error stays cleared during a full test cycle.
5. Remove the old turbidity sensor. This may require twisting it or removing a retaining clip.
6. Install the new turbidity sensor, making sure it is securely in place.
7. Reconnect the wiring harness and reassemble the washer panels 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 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