Bosch Washer Error Code F25: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
Error Code
F25
Brand
Bosch
Product Type
washer
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
The Bosch F25 error code indicates a problem with the aquasensor (turbidity sensor) that measures water clarity and soil levels. This sensor can become dirty from detergent residue and fabric particles, or may be defective and need replacement.
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Tools You'll Need

How to Fix Error Code F25

  1. Power down and unplug the washer

    Always unplug electrical appliances before performing any maintenance to prevent shock hazards.
  2. Run a cleaning cycle first

  3. Access the aquasensor location

    Take photos of wire connections before disconnecting to ensure proper reassembly.
  4. Inspect and clean the sensor

  5. Test sensor resistance

  6. Reinstall or replace the sensor

  7. Test the repair

Parts You May Need

Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
Aquasensor (turbidity sensor)
Check Price on Amazon
Washer cleaner or white vinegar
Check Price on Amazon
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When to Call a Professional

Call a professional technician if you're uncomfortable working with electrical components, if the sensor location is difficult to access, or if the error persists after sensor replacement. Some models may require diagnostic software to properly calibrate the new sensor.

Frequently Asked Questions

What causes Bosch washer F25 error code?
F25 error occurs when the aquasensor (turbidity sensor) becomes dirty from detergent buildup, fabric particles, or hard water deposits, or when the sensor itself fails and needs replacement.
Can I still use my Bosch washer with F25 error?
The washer may not operate properly with F25 error as it affects the machine's ability to determine wash cycle length and rinse requirements. It's best to fix the issue to ensure proper cleaning performance.
How much does it cost to fix F25 error on Bosch washer?
DIY repair costs $30-80 for a replacement aquasensor. Professional repair typically costs $150-250 including parts and labor, depending on your location and service provider.
How often should I clean my Bosch washer to prevent F25 error?
Run a cleaning cycle monthly using washer cleaner or white vinegar, and leave the door open after use to air dry. This prevents buildup that can affect the aquasensor and other components.
Is F25 error covered under Bosch warranty?
F25 errors are typically covered under warranty if caused by manufacturing defects, but not if caused by normal wear, improper maintenance, or user error. Check your specific warranty terms and contact Bosch support.