Author: ApplianceFixGuide Team

Error Code: LOW HEAT DRYING SYMBOL Difficulty: Easy

Problem: Gentle drying for delicate fabrics is activated.

How to Fix LOW HEAT DRYING SYMBOL Error (Step-by-Step)

1. This symbol indicates that the ‘Low Heat’ or ‘Gentle’ drying option is selected, which is best for delicate fabrics like synthetics or silk.
2. If your laundry consists of more robust fabrics like cotton or towels, you may want to turn this feature off for faster drying.
3. Ensure the dryer is powered on and a cycle has been selected with the main dial.
4. Locate the button on the control panel labeled ‘Low Heat’, ‘Gentle’, or with a feather icon.
5. Press this button once to deactivate the low heat setting. The light on the button or the symbol on the display should turn off.
6. If you accidentally turned it off for a delicate load, simply press the button again to reactivate the ‘Low Heat’ function.
7. Press ‘Start’ to begin the cycle with the desired heat setting.
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.

Browse all Bosch error codes: Bosch Error Codes

Error Code: KEY SYMBOL Difficulty: Easy

Problem: The childproof lock is activated, locking the control panel.

How to Fix KEY SYMBOL Error (Step-by-Step)

1. Recognize that the key symbol means the childproof lock is active, which prevents settings from being changed accidentally.
2. To deactivate the lock, locate the button or buttons used to control it. This is often the ‘Start’ button or a button with a small key icon next to it.
3. Press and hold this specific button for approximately 3 to 5 seconds.
4. Watch the display screen. The key symbol should disappear, and you may hear a beep, indicating the control panel is now unlocked.
5. You can now select a cycle and change any settings as needed.
6. To reactivate the child lock after starting a cycle, simply press and hold the same button again for 3-5 seconds until the key symbol reappears.
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.

Browse all Bosch error codes: Bosch Error Codes

Error Code: IRON DRY SYMBOL Difficulty: Easy

Problem: The dryer is in the ‘Iron Dry’ mode, leaving clothes slightly damp for easier ironing.

How to Fix IRON DRY SYMBOL Error (Step-by-Step)

1. Understand that this is a feature, not an error. The ‘Iron Dry’ setting leaves clothes slightly damp to make ironing easier.
2. If you want drier clothes, press the power button to ensure the dryer is on.
3. Look for a button on the control panel labeled ‘Drying Level’, ‘Dryness’, or an icon with multiple suns.
4. Press this button repeatedly to cycle through the available dryness levels.
5. Watch the display panel as you press the button. You will see indicators for ‘Damp Dry’, ‘Iron Dry’, ‘Cupboard Dry’ (or ‘Normal’), and ‘Cupboard Dry+’ (or ‘Extra Dry’).
6. Stop pressing the button when the indicator for ‘Cupboard Dry’ or ‘Cupboard Dry+’ is lit for fully dried laundry.
7. Press the ‘Start’ button to begin the cycle with the new setting.
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.

Browse all Bosch error codes: Bosch Error Codes

Error Code: HOT Difficulty: Easy

Problem: The appliance is in the cooling down process after a high-temperature cycle.

How to Fix HOT Error (Step-by-Step)

1. Recognize that this is not an error code, but an informational message.
2. The dryer is indicating that it is in a cool-down phase after a cycle that used high heat.
3. Do not attempt to open the door or interrupt the process.
4. Allow the dryer to continue its cool-down cycle, which helps to reduce wrinkles and make clothes more comfortable to handle.
5. The “HOT” message will disappear from the display automatically once the internal temperature has reached a safe level.
6. Once the message is gone and the cycle is complete, you can safely open the door and remove the laundry.
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.

Browse all Bosch error codes: Bosch Error Codes

Error Code: H95 Difficulty: Hard

Problem: No water during the drying phase (needed to rinse the condenser).

How to Fix H95 Error (Step-by-Step)

1. Shut off the water supply to the dryer and unplug the appliance from the power outlet.
2. Remove the back panel to access the water inlet valve (part 00422244).
3. Check the water inlet hoses for any kinks or blockages. Ensure the house water supply is turned on.
4. Disconnect the hoses and the electrical connector from the valve.
5. Remove the screws mounting the valve to the dryer chassis and replace it with the new valve.
6. Reconnect the hoses and electrical plug, then turn the water supply back on and check for leaks.
7. Reinstall the back panel, plug in the dryer, and begin a cycle to confirm the fix.
8. Turn the appliance off, wait about 2 minutes, then turn it back on.

Browse all Bosch error codes: Bosch Error Codes

Error Code: F68 Difficulty: Hard

Problem: Circulation pump operation after switch-off.

How to Fix F68 Error (Step-by-Step)

1. Disconnect the dryer from the power source by unplugging it from the wall outlet. Also, turn off the water supply if you have a condensation dryer connected to a water line.
2. Remove the lower front access panel of the dryer. This may require removing a few screws, typically located at the bottom edge of the panel.
3. Place a shallow pan and towels under the circulation pump to catch any residual water. The pump is usually located at the bottom of the appliance and has several hoses connected to it.
4. Carefully disconnect the wire harnesses attached to the pump. Then, use pliers to release the clamps on the hoses connected to the pump and slide them off.
5. Unmount the old circulation pump from the dryer’s base. It may be held in place by screws or a mounting bracket.
6. Install the new circulation pump, ensuring it is securely mounted. Reconnect the hoses and secure them with the clamps, then plug the wire harnesses back into their correct terminals.
7. Reattach the lower access panel, restore power and water to the dryer, and run a test cycle to ensure the pump operates correctly and there are no 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.

Browse all Bosch error codes: Bosch Error Codes

Error Code: F57 Difficulty: Hard

Problem: Communication fault between the power boards or an inverter failure.

How to Fix F57 Error (Step-by-Step)

1. Disconnect the dryer from the power outlet completely. This is a critical safety step.
2. Remove the top panel of the dryer by unscrewing the screws at the back. Slide the panel backward and lift it off.
3. Locate the inverter power module. It is typically a circuit board in a plastic housing, mounted to the base or side panel of the dryer’s interior.
4. Take a clear photo of all the wire connections on the old inverter module to use as a reference. Carefully disconnect all wire harnesses attached to the board. Most have small locking tabs that need to be pressed to release the connector.
5. Unscrew or unclip the old inverter module from its mounting bracket and remove it from the dryer.
6. Install the new inverter module (part 00641857) into the same position, securing it with the original screws or clips.
7. Using your photo as a guide, reconnect all wire harnesses to the correct terminals on the new board until they click securely into place. Reassemble the dryer panels, plug it back in, and run a 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.

Browse all Bosch error codes: Bosch Error Codes

Error Code: F40 Difficulty: Hard

Problem: Communication error between the machine control and motor control.

How to Fix F40 Error (Step-by-Step)

1. UNPLUG THE DRYER. Turn off the corresponding circuit breaker for complete safety before beginning any work.
2. Remove the top panel of the dryer by unscrewing the screws at the back or sides, then sliding the panel off. This will give you access to the main control board.
3. Locate the main control board (power module), typically housed in a plastic case near the front of the dryer, and the motor control board, usually located at the bottom of the dryer near the motor.
4. Carefully inspect the wiring harness that runs between these two boards. Look for any signs of damage, such as pinched, broken, or burnt wires. Ensure the connectors at both ends are securely plugged in.
5. Disconnect and then firmly reconnect the main wiring harness plugs on both the main control board and the motor control board. Sometimes a loose connection is all that’s wrong.
6. If the connections are secure and undamaged, the main control board (power module) has likely failed and needs to be replaced. Carefully label and disconnect all wire harnesses from the old board, remove its mounting screws, and install the new board in its place.
7. Reconnect all wiring harnesses to the new control board, reassemble the dryer by securing the top panel, and plug the dryer 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.

Browse all Bosch error codes: Bosch Error Codes

Error Code: F27 Difficulty: Hard

Problem: Faulty pressure sensor.

How to Fix F27 Error (Step-by-Step)

1. Unplug the dryer from the wall outlet to ensure your safety.
2. Remove the screws from the back of the dryer that hold the top panel in place. Slide the top panel backward and lift it off to access the internal components.
3. Locate the pressure sensor. It is a small plastic part, often circular or rectangular, with a thin rubber tube and a wiring harness connected to it, usually mounted on the inside wall of the dryer cabinet.
4. Carefully disconnect the wire connector from the sensor by pressing the release tab and pulling it straight out. Gently twist and pull the thin rubber hose off of the sensor’s port.
5. The sensor is typically mounted with a single screw or a locking tab. Remove the screw or depress the tab to release the old sensor from its mounting bracket.
6. Position the new pressure sensor onto the mounting bracket and secure it with the screw or by snapping it into place. Firmly reattach the rubber hose and plug the electrical connector back in until it clicks.
7. Reinstall the top panel and secure it with the screws. Plug the dryer back in and run a cycle to confirm the error is resolved.
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.

Browse all Bosch error codes: Bosch Error Codes

Error Code: F26 Difficulty: Hard

Problem: Analogue pressure sensor issue.

How to Fix F26 Error (Step-by-Step)

1. Disconnect the dryer from the power source by unplugging it from the wall outlet to ensure safety.
2. Remove the top panel of the dryer. This is typically secured by screws at the back or sides of the appliance.
3. Locate the analogue pressure sensor. It is a small component, usually mounted near the bottom or side of the dryer, with a thin hose and an electrical connector attached.
4. Carefully disconnect the electrical wiring harness from the old sensor by pressing the locking tab and pulling the connector straight off.
5. Disconnect the thin rubber or plastic hose from the sensor. Be gentle to avoid damaging the hose.
6. Remove the old sensor from its mounting bracket. It may be held in place by a screw or a clip.
7. Install the new pressure sensor by securing it to the mounting bracket, reattaching the hose, and plugging in the electrical connector until it clicks into place.
8. Reassemble the dryer by securing the top panel, then plug the dryer back in and run a test cycle.

Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.

Browse all Bosch error codes: Bosch Error Codes