E91 Moderate Hard — consider a tech

Frigidaire Washer E91 — UI EEPROM checksum failure

Frigidaire Washer · Error code E91

What E91 Means

The user interface board's saved settings are corrupted. The washer may revert to defaults or refuse to start.

Symptoms

  • E91 at power-on
  • Settings won't save
  • Display behaves erratically

Common Causes

1
Power surge corrupted EEPROM

Lightning or grid event scrambled saved data.

2
Failing UI memory chip

EEPROM at end of write-cycle life.

3
Aborted firmware update

Power lost mid-update during service.

How to Fix It

  1. Unplug for 10 minutes — sometimes clears soft corruption.
  2. Attempt the model's factory reset sequence per the tech sheet.
  3. If E91 persists, replace the UI board.
  4. Use a surge protector to prevent recurrence.

Parts You May Need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

Common replacement Frigidaire UI control board View on Amazon→ Common replacement Whole-house or appliance surge protector View on Amazon→

More Frigidaire Washer Codes

E10 E10 — Water fill problem E11 E11 — Fill time too long E13 E13 — Water leak or air leak in pressure system E20 E20 — Drain pump won't pump out E21 E21 — Slow drain / water remains in tub E23 E23 — Drain pump relay fault on control board

All Frigidaire codes → All washer codes →

Verified against manufacturer documentation: frigidaire.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.