Bosch Dishwasher Error Code E28 – Meaning and Possible Fixes
Bosch Dishwasher Error Code E28
If your Bosch dishwasher displays Error Code E28, it usually indicates that the appliance has detected a problem with the water turbidity sensor. This sensor measures how dirty the water is during the wash cycle and helps the dishwasher adjust the program for better cleaning performance.
If the dishwasher cannot correctly read the turbidity sensor, it may stop the cycle or display the E28 error code.
View all Bosch dishwasher error codes.
What the E28 Error Means
The E28 error code generally indicates that the dishwasher is unable to correctly measure the cleanliness of the water inside the appliance. Bosch dishwashers use a turbidity sensor to determine how much food residue or dirt is present in the water.
If the sensor cannot operate correctly or cannot send accurate readings to the control system, the dishwasher may interrupt the cycle and display the E28 error.
Common Reasons This Error Appears
Dirty sensor area
Food residue, grease or limescale may affect the turbidity sensor’s ability to detect water clarity.
Blocked filters
If the dishwasher filters are heavily clogged, the system may not be able to properly circulate and monitor the water.
Temporary electronic glitch
A brief interruption in power or system reset may occasionally trigger the error code.
Safe Checks You Can Try
Before contacting a technician, there are a few safe checks you can perform.
Clean the dishwasher filters
- Open the dishwasher and remove the lower rack.
- Locate the filter assembly at the bottom of the appliance.
- Remove the filters and rinse them under running water.
Run a cleaning cycle
Use a dishwasher cleaner and run an empty hot wash cycle to remove grease and buildup inside the appliance.
Reset the dishwasher
- Turn the dishwasher off using the power button.
- Switch off power at the wall socket or circuit breaker.
- Wait several minutes.
- Restore power and start a new wash cycle.
If You Need Spare Parts
If you’re confident carrying out the repair yourself, compatible Bosch dishwasher parts are available on Amazon with next day delivery.
Always check your model number before ordering to ensure compatibility.
When To Contact A Professional
If the E28 error continues to appear after cleaning the filters and resetting the appliance, the dishwasher may require inspection by a qualified appliance technician.
The internal sensor system and electronic controls should only be inspected or repaired by trained professionals.
Related Bosch Dishwasher Error Codes
You may also encounter related issues indicated by Bosch Dishwasher Error Code E24, Bosch Dishwasher Error Code E25 and Bosch Dishwasher Error Code E27.
Error code meanings can vary slightly between Bosch models.
Always consult your appliance manual or a qualified technician if the issue persists.
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