Whirlpool Washer - F28 Error Code
Communication error between CCU and MCU.
Meaning
Communication error between CCU and MCU.
The F28 error indicates that the washer’s central control unit (CCU) and motor control unit (MCU) are not communicating correctly. Whirlpool Duet washers use a digital serial communication link between these boards. If the signal is interrupted due to wiring issues, board failure, or electrical noise, the washer triggers F28. This error is similar to F11 but typically appears during high‑load motor operations.
Symptoms
Causes
Step-by-Step Fixes
- Unplug the washer for 5 minutes to reset communication.
- Inspect all wiring harnesses between CCU and MCU.
- Reseat the connectors firmly.
- Replace the MCU or CCU if communication cannot be restored.
Safety Notes
- Disconnect power before accessing internal electronics.
Applicable Models
Show Models
- GHW9100LW
- GHW9150PW
Related Pages
Other Whirlpool Washer Error Codes
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- Whirlpool Washer F25 Error Code
- Whirlpool Washer F26 Error Code
- Whirlpool Washer F27 Error Code
- Whirlpool Washer F29 Error Code
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- Whirlpool Washer F5 E2 Error Code
- Whirlpool Washer F5 E3 Error Code
- Whirlpool Washer F5 Error Code
- Whirlpool Washer F51 Error Code
- Whirlpool Washer F52 Error Code
- Whirlpool Washer F54 Error Code
- Whirlpool Washer F6 E3 Error Code
- Whirlpool Washer F7 E1 Error Code
- Whirlpool Washer F7 E7 Error Code
- Whirlpool Washer F7 Error Code
- Whirlpool Washer F72 Error Code
- Whirlpool Washer F73 Error Code
- Whirlpool Washer F8 E1 Error Code
- Whirlpool Washer F8 E3 Error Code
- Whirlpool Washer F8 Error Code
- Whirlpool Washer F83 Error Code
- Whirlpool Washer F84 Error Code
- Whirlpool Washer F9 E1 Error Code
- Whirlpool Washer F9 Error Code
- Whirlpool Washer F99 Error Code
- Whirlpool Washer LO FL Error Code
- Whirlpool Washer LOC Error Code
- Whirlpool Washer SUD Error Code
- Whirlpool Washer SUDS Error Code
Model-Specific Notes
On Duet models, F28 often appears during high‑speed spin when vibration momentarily disrupts CCU‑MCU communication.
Disclaimer
The information provided on this page is for educational and informational purposes only. Repairs involve electrical, mechanical, and water-related risks. Always follow manufacturer instructions and consider contacting a qualified technician for diagnosis or repair.