Category: Dishwasher

How to Fix Bosch Dishwasher Error E27
Error Code: E27 Difficulty: Easy

Problem: Low voltage in the power supply.

How to Fix E27 Error (Step-by-Step)
1. Locate your home’s main electrical panel and check if the circuit breaker dedicated to the dishwasher has tripped. If it is in the middle or off position, flip it fully off and then back on to reset it.
2. Ensure the dishwasher’s power cord is pushed all the way into the wall outlet. Sometimes vibrations can cause it to become loose.
3. Examine the entire length of the power cord for any visible signs of damage, such as cuts, burns, or frayed wires. A damaged cord can cause voltage issues.
4. To verify the outlet is working correctly, unplug the dishwasher and plug in a small, known-working appliance like a lamp or a phone charger.
5. Dishwashers should be on a dedicated circuit. Remove any extension cords or power strips and plug the appliance directly into the wall outlet.
6. If these steps do not resolve the issue, the problem may be with your home’s wiring, which requires a professional electrician to diagnose and repair.
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 10, 2026
How to Fix Bosch Dishwasher Error E23
Error Code: E23 Difficulty: Hard

Problem: Issue with the drain pump (blocked, clogged, or faulty).

How to Fix E23 Error (Step-by-Step)
1. Disconnect the dishwasher from the electrical supply at the circuit breaker.
2. Shut off the water supply and disconnect the water inlet and drain hoses.
3. Pull the dishwasher out from its installation and lay it on its back to access the components underneath.
4. Locate the drain pump. It is a smaller pump, separate from the main circulation pump.
5. Unplug the wire connector to the pump and release the clamps on the hoses to detach them. Be prepared to catch any remaining water.
6. Remove the old drain pump, which is often held in place by a few screws or a twisting lock mechanism.
7. Install the new drain pump, reconnect the hoses and wiring, and if the problem persists after reassembly and testing, the main control module may also need to be replaced.
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 10, 2026
How to Fix Bosch Dishwasher Error E22
Error Code: E22 Difficulty: Easy

Problem: Blocked filter.

How to Fix E22 Error (Step-by-Step)
1. Open the dishwasher door and slide the bottom rack completely out of the tub.
2. Locate the filter assembly in the bottom center of the dishwasher floor.
3. The assembly usually consists of two parts: a cylindrical micro-filter and a flat coarse filter. Twist the cylindrical filter counter-clockwise to unlock it.
4. Lift out the cylindrical filter and then remove the flat mesh filter plate that was underneath it.
5. Thoroughly rinse both filter components under warm running water. Use a soft brush to gently remove any food particles or built-up grime.
6. Clean any debris from the sump area where the filter sits.
7. Reinstall the flat filter first, ensuring it sits flush, then place the cylindrical filter back and twist it clockwise until it locks securely in place.
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 9, 2026
How to Fix Bosch Dishwasher Error E20
Error Code: E20 Difficulty: Hard

Problem: Heat pump internal heater error.

How to Fix E20 Error (Step-by-Step)
1. Turn off the power to the dishwasher at the main circuit breaker to ensure safety.
2. Shut off the water supply and disconnect the drain and supply lines from the appliance.
3. Carefully pull the dishwasher out of its cabinet. You may need to lay it on its back on a protective towel to access the bottom components.
4. Locate the main pump (also called a heat pump or circulation pump) and the main control module.
5. Methodically disconnect the wiring harnesses and hoses attached to the pump. Take photos beforehand to remember the connections.
6. Unbolt and remove the old pump. At the same time, locate and replace the control module, carefully transferring each wire connector to the new board.
7. Install the new main pump, ensuring all hose clamps and electrical connections are secure. Set the dishwasher upright, reconnect utilities, 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.
April 9, 2026
How to Fix Bosch Dishwasher Error E21
Error Code: E21 Difficulty: Hard

Problem: Blocked heat pump.

How to Fix E21 Error (Step-by-Step)
1. Cut all power to the dishwasher by switching off the corresponding circuit breaker.
2. Turn off the hot water supply valve under the sink.
3. Gently slide the dishwasher out from its installed position. It’s best to place it on its back on a soft blanket or cardboard to access the underside.
4. Identify the circulation pump, which is a large motor and housing assembly near the center.
5. Disconnect the electrical wires leading to the pump and detach the inlet and outlet hoses. Have a shallow pan and towels ready for water that will drain out.
6. Remove the screws or release the tabs that mount the pump to the dishwasher’s sump assembly and remove the old pump.
7. Mount the new circulation pump, reattach the hoses and wiring, and carefully return the dishwasher to its upright position before reinstalling and testing.
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 9, 2026
How to Fix Bosch Dishwasher Error E19
Error Code: E19 Difficulty: Hard

Problem: Detergent dispenser solenoid circuit error.

How to Fix E19 Error (Step-by-Step)
1. Disconnect the dishwasher from its power source by turning off the circuit breaker and shut off the water supply valve, usually located under the sink.
2. Carefully slide the dishwasher out from under the counter to access its sides and back.
3. Remove the outer side panels and the base panel at the bottom front to expose the internal components.
4. Locate the heat exchanger assembly on the side of the unit and identify the outlet valve connected to it.
5. Unplug the electrical connector from the valve solenoid and carefully detach the connected hoses, being prepared for some residual water to spill.
6. Remove the old valve, which may be held by clips or screws, and install the new heat exchanger outlet valve in its place.
7. Reconnect the hoses and electrical connector, reassemble the panels, slide the dishwasher back into place, and restore power and water to test the repair.
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 9, 2026
How to Fix Bosch Dishwasher Error E12
Error Code: E12 Difficulty: Easy

Problem: Limescale build-up in the heat pump.

How to Fix E12 Error (Step-by-Step)
1. Run a cleaning cycle with a dishwasher-specific descaling product and confirm the error stays cleared during a full test cycle.
2. Pour the descaler directly into the bottom of the empty dishwasher.
3. Select the hottest and longest wash cycle available on your dishwasher.
4. Allow the cycle to run completely without interruption and confirm the error stays cleared during a full test cycle.
5. For heavy buildup, a second treatment may be necessary and confirm the error stays cleared during a full test cycle.
6. Regularly use a descaler every 1-3 months to prevent future limescale accumulation.
7. Ensure your water softener (if you have one) is functioning correctly and filled with salt.
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 9, 2026
How to Fix Bosch Dishwasher Error E10
Error Code: E10 Difficulty: Easy

Problem: Zeolite (CrystalDry) chamber heater fault.

How to Fix E10 Error (Step-by-Step)
1. Disconnect the dishwasher from the power supply and confirm the error stays cleared during a full test cycle.
2. Open the dishwasher door and locate the Zeolite container, usually at the bottom.
3. Carefully remove the lower rack to get better access and confirm the error stays cleared during a full test cycle.
4. Inspect the heating element within the Zeolite chamber for any visible signs of damage or disconnection.
5. If a wire is loose, reconnect it securely and confirm the error stays cleared during a full test cycle.
6. If the element appears damaged, it will need to be replaced.
7. Reassemble and restore power to see 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 9, 2026
How to Fix Bosch Dishwasher Error E06
Error Code: E06 Difficulty: Hard

Problem: Door sensor circuit fault.

How to Fix E06 Error (Step-by-Step)
1. Disconnect the dishwasher from power at the circuit breaker and confirm the error stays cleared during a full test cycle.
2. Open the dishwasher door and remove the Torx screws that hold the inner and outer door panels together.
3. Separate the outer door panel to get access to the door latch assembly at the top of the door.
4. Disconnect the wire harness connected to the microswitch on the latch.
5. Remove the screws holding the old door latch assembly in place and remove it.
6. Install the new door latch assembly, making sure to secure it with the screws and reconnect the wire harness.
7. Reassemble the door panels, restore power, and test the dishwasher by starting a cycle to ensure it locks and runs correctly.
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 9, 2026
How to Fix Bosch Dishwasher Error E07
Error Code: E07 Difficulty: Hard

Problem: Zeolite (CrystalDry) fan motor fault.

How to Fix E07 Error (Step-by-Step)
1. Disconnect the dishwasher from power and water supplies and confirm the error stays cleared during a full test cycle.
2. Carefully pull the dishwasher out from under the counter and confirm the error stays cleared during a full test cycle.
3. Locate and remove the side and top panels to access the internal components.
4. Identify the drying fan assembly, which is typically located at the base of the dishwasher.
5. Disconnect the wiring harness and any mounting screws securing the old fan.
6. Install the new drying fan assembly, ensuring all connections are secure.
7. Reassemble the dishwasher panels, slide it back into place, and reconnect power and water.
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 9, 2026