⚠️ Safety Warning: Appliance repair involves electricity, gas, and moving parts. Always disconnect power before working on any appliance.
Error Code: Washer Difficulty: Hard
Problem: Communication error between main control board (CCU) and user interface board
How to Fix Washer Error
- Unplug washer for 2 minutes to reset communication bus.
- Remove top panel to access main control board (CCU) connections.
- Locate ribbon cable or multi-wire harness connecting CCU to user interface/display board.
- Disconnect and reconnect both ends of harness, inspecting for bent pins or corrosion.
- Check harness routing for pinch points between cabinet panels.
- Verify display board receives 5V DC from CCU (test at connector pins).
- Inspect display board for moisture damage or burnt components near communication IC.
- If harness tests good (continuity on all pins) but error persists, replace user interface board first (less expensive).
- If F28 returns after interface replacement, replace main control board W
- After repair, verify all display functions and button responses operate correctly through diagnostic mode.
Recommended Replacement Part
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
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Expert: Mike Sullivan
EPA Section 608 Certified Technician with 18+ years experience.
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