⚠️ Safety Warning: Appliance repair involves electricity, gas, and moving parts. Always disconnect power before working on any appliance.
Error Code: E91 Difficulty: Hard
Problem: User interface board or UI/main board communication failure.
How to Fix E91 Error (Step-by-Step)
- Power down the washer completely by unplugging it from the wall outlet.
- Access both the main control board (usually at the bottom or back) and the user interface board (in the top console).
- Carefully inspect the wiring harness that runs between the two boards.
- Look for any signs of pinched, broken, or disconnected wires.
- Reseat the connections on both ends of the harness to ensure a firm connection.
- If the wiring looks good, the issue is likely one of the boards. Replacing the user interface board is often easier for homeowners.
- If replacing the UI board doesn’t solve the issue, the main control board will likely need to be replaced.
- Turn the appliance off, wait about 2 minutes, then turn it back on.
Recommended Replacement Part
OEM Part #: (Varies by model) (Main Control Board)
Estimated Market Price: $185-$670
Check Price & Availability →Verified Compatible Alternatives:
- (Varies by model) (User Interface Board)
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
Most DIY parts are $50–$250. If you have a quote, use the total.
More options (for a better recommendation)
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Expert: Mike Sullivan
EPA Section 608 Certified Technician with 18+ years experience.
Read Editorial Standards →Browse all Frigidaire error codes: Frigidaire Error Codes
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