Bosch Dishwasher Error Code E28: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
E28
Brand
Bosch
Product Type
dishwasher
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code E28 on your Bosch dishwasher indicates a problem with the turbidity sensor, which measures how dirty the water is to optimize wash cycles. This fault can cause incomplete cycles or poor cleaning results. Don't worry, many causes are easy to fix at home.
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Tools You'll Need

How to Fix Error Code E28

  1. Power Cycle the Dishwasher

    Always unplug or disconnect power before working on internal components.

  2. Clean the Turbidity Sensor

  3. Check Sensor Wiring

    Make sure power is off before handling electrical connections.

  4. Test the Turbidity Sensor with a Multimeter

    Be careful not to short the wires. If you are not comfortable using a multimeter, skip this step.

  5. Inspect the Main Control Board

    The control board carries high voltage even when unplugged due to capacitors. Proceed with extreme caution or hire a technician.

Parts You May Need

Turbidity sensor
Check Price on Amazon
Turbidity sensor
Check Price on Amazon
Turbidity sensor
Check Price on Amazon
Turbidity sensor
Check Price on Amazon
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When to Call a Professional

If cleaning the sensor and checking wiring does not resolve the error, or if you are uncomfortable using a multimeter, call a qualified appliance technician. Control board issues also require professional diagnosis.

Frequently Asked Questions

What does error code E28 mean on a Bosch dishwasher?
Error code E28 indicates a turbidity sensor fault. The sensor that measures water cloudiness is not working correctly, which can affect wash cycle performance.
Can I still use my Bosch dishwasher with error E28?
It is not recommended. The dishwasher may not clean properly or could stop mid-cycle. It's best to fix the issue before further use.
How do I clean the turbidity sensor on my Bosch dishwasher?
Access the sensor at the bottom of the dishwasher, usually near the filter. Wipe it gently with a soft cloth dampened with mild soap and water. Do not use harsh chemicals.
How much does it cost to replace a Bosch dishwasher turbidity sensor?
The part costs around $30-$70. If you hire a technician, labor adds $100-$200. DIY replacement is straightforward if you have basic tools.
Is error E28 covered under warranty?
Yes, if your Bosch dishwasher is still under the standard 1-2 year warranty, this fault is typically covered. Check your warranty terms.

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