How to Fix Bosch Washer Error F28

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⚠️ Safety Warning: Appliance repair involves electricity, gas, and moving parts. Always disconnect power before working on any appliance.

Error Code: F28 Difficulty: Moderate

Problem: Flow sensor malfunction or issue.

⚖️ Repair Decision

✅ WORTH FIXING

Parts under $100

How to Fix F28 Error (Step-by-Step)

Disconnect the power cord of the washer from the electrical outlet.
The flow sensor is part of the water inlet valve assembly, located where the water hoses connect to the washer.
To access it, you will need to remove the back panel of the washer.
Identify the flow sensor and disconnect the electrical wires connected to it.
The flow sensor is often integrated with the inlet valve, so you may need to replace the entire valve assembly.
Remove the old inlet valve assembly and install the new one, reconnecting the water hoses and the electrical wires.
Secure the back panel and test the washer and confirm the error stays cleared during a full test cycle.
Turn the appliance off, wait about 2 minutes, then turn it back on.

OEM Part #: Flow Sensor

Estimated Market Price: $47-$62

Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.

Appliance Type

Appliance Age

Estimated repair cost (parts, or parts + labor) Most DIY parts are $50–$250. If you have a quote, use the total.

Is it under warranty?

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Get the ‘Secret Service Mode’ Cheat Sheet for your Bosch model. Includes an easy-to-read list of every error code and quick diagnostic tips.