How to clear an E6 error on a Bosch dishwasher

Finding an E6 error on your Bosch dishwasher can be frustrating, but this code is fairly straightforward to troubleshoot and resolve. Let’s walk through the process so you can get your dishwasher running again.

If you find out that you need any replacement parts for your Bosch dishwasher while you’re troubleshooting, you can enter your model number at AppliancePartsPros.com to order them. Most orders arrive in just two business days, and we have thousands of free guides to show you how to install your new parts.

Disclaimer: The error code information in this article is based on general service manuals and may not apply to your specific appliance model. While we strive to offer helpful advice for DIY appliance repairs, variations in models and configurations can lead to differences in troubleshooting steps, error codes and part replacements. For the most accurate guidance, we strongly recommend consulting the technical sheet for your specific appliance model.

What does the E6 error code mean?

The E6 error code usually indicates an issue with the dishwasher’s AquaSensor (also known as a turbidity sensor or clean water sensor). It monitors the cleanliness of the water during the wash cycle to determine how much soil has been removed from the dishes.

Based on the aqua feedback, the dishwasher control board will lengthen or shorten wash and rinse cycles accordingly. If the E6 error appears, it means the control board is unable to read a signal from the AquaSensor to gauge the water’s cleanliness.

There are several possible causes behind an E6 error code, including:

• A faulty AquaSensor
• Loose wiring connections
• Control board issues
• Clogged filters

Read more: Dishwasher Not Fully Cleaning Dishes: Top 5 Reasons & Fixes

Safety precautions

When working on any appliance, remember to keep safety first. Here are some tips to keep in mind:

• Always power off and unplug your appliance or switch off the circuit breaker before you attempt any maintenance or replacement work. This keeps you safe by eliminating any risk of electric shock.
• If the appliance has recently been used, give it plenty of time to cool down before working on it.
• Turn off the water supply at the outlet before beginning repairs. Keep towels ready to catch any residual water in the system when removing parts.
• Take your time while working to prevent accidents and personal injuries. Rushing is the enemy of precision.
• Work in a well-lit area so you can see and access appliance parts.
• Keep your workspace free of clutter and other obstacles. Keep children and pets away from the work area.
• Never work on internal parts with wet hands. Make sure the work area is completely dry.
• Check the user manual to see if there are specific installation or safety instructions related to your appliance or replacement part.
• Be gentle when handling or removing parts. Excessive force might damage the appliance or cause personal injury.
• Wear insulated work gloves to protect your hands from sharp metal parts and debris.
• When working with wires, avoid touching any exposed wires or terminals. If you need to touch a wire, use a non-conductive tool or wear insulating gloves to prevent electrical shock.
• Always take photos or make a note of wiring terminals or other connections before disconnecting them to make reassembly easier.
• Don’t test live voltage with a multimeter if you’re unfamiliar with how to prevent short-circuiting.

How to troubleshoot the E6 error code

Follow these steps to clear the E6 error from your Bosch dishwasher.

Step 1 – Power cycle the dishwasher

1. Unplug the dishwasher or shut off the power at the breaker.
2. Let the dishwasher rest for at least 2-3 minutes before restoring power.
3. Plug the dishwasher back in. If the E6 error code still shows up, move on to the next step.

Step 2 – Clean or replace the filters

Clogged or blocked dishwasher filters can limit water circulation through the spray arms and past the AquaSensor, which can lead to an E6 error.

1. Unplug the dishwasher from the power outlet and shut off the water supply.
2. Remove the lower spray arm to check the cylindrical primary filter.
3. Take out the large particle drain filter from the bottom of the tub.
4. Flush both filters thoroughly under a faucet. If needed, scrub them with a soft brush to dislodge any stubborn debris. If the filters are damaged or severely soiled to the point that they can’t be cleaned, replace them as needed.
5. Reinstall both filters once they’re cleaned.
6. Plug the dishwasher back in and turn on the water supply.
7. Try starting a test cycle. If the E6 error still shows up, move on to the next step.

Step 3 – Check the water temperature

Hot water is required for the AquaSensor to measure the cleanliness of the wash water. If the water temperature is too low, the dishwasher may display an E6 error.

1. Unplug the dishwasher from the power outlet.
2. Set your multimeter to measure resistance (Ω).
3. Use the meter probes to test the resistance through the heating element.
4. Check the meter reading. Replace the element if it’s damaged or way out of the acceptable resistance range. You can usually find the acceptable resistance values on your model’s technical sheet.
5. Check the door seal, tub insulation, and vent paths for any issues that may be allowing heat loss from the tub.
6. Use an independent, dishwasher-safe thermometer to make sure the wash water temperature reaches 140-150°F.

Step 4 – Inspect the AquaSensor

1. Make sure the dishwasher is unplugged from the power outlet.
2. Find the AquaSensor, which is housed at the back part of the bottom of the tub.
3. Check for any debris around the sensor that could be blocking water flow or readings. Clear any obstructions that you find.
4. Check the sensory tube to make sure it’s intact and not blocked.
5. Make sure the electrical connector is securely attached to the sensor and undamaged.
6. Unplug the sensor wiring harness and set a multimeter to measure resistance (Ω).
7. Use the multimeter probes to check the resistance through the sensor. You can check the technical sheet for your dishwasher model to find the acceptable range.

If you get a resistance reading outside the acceptable range, then the AquaSensor (turbidity sensor) needs to be replaced.

If the AquaSensor tests OK, move on to the next step.

Step 5 – Check the control board

With the dishwasher unplugged, check all the wiring and connections leading to and from the control board. If you see any frays, burn spots or other signs of damage, replace the wiring or board as needed. Reconnect any loose connections that you find.

If everything up to this point has tested good, then the control board is faulty and needs to be replaced.

Read more: How to Clean a Dishwasher

Additional information

Thank you for reading! We hope this guide helped you get your Bosch dishwasher working again.

If you have any other appliance repair needs or projects, don’t hesitate to explore our other troubleshooting guides and videos.

If you need replacement parts or some extra help with ordering them, grab your model number and head over to AppliancePartsPros.com, where you can chat with a pro, read our DIY blog and more.

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