Frigidaire Washer Error Code E90 — What It Means & How to Fix It

What Does This Error Mean?

E90 means your Frigidaire washer's control boards have lost communication with each other. The main control board and the user interface board are not talking properly. A power reset often fixes this — but a board fault may be to blame.

Affected Models

Frigidaire FFTW4120SW
Frigidaire FFTW1001PW
Frigidaire Gallery FGFW4065PW
Frigidaire Classic Series

Common Causes

Power surge or brownout interrupted communication between the boards
Wire harness connecting the two boards is loose, damaged, or corroded
Main control board has developed a fault and needs replacing
User interface board (the control panel) has failed
Software or firmware glitch in the control system

How to Fix It

Unplug the washer from the wall and wait 5 full minutes.

A hard reset clears the board memory and often resolves temporary communication errors.
Plug the washer back in and start a short test cycle.

If E90 was a one-time glitch, it should not return after the reset.
Check that the washer is plugged into a properly grounded outlet.

Plug the washer directly into a wall outlet — not an extension cord or power strip.
If E90 returns, unplug the machine and inspect the wire harness.

The harness runs between the control panel and the main board. Look for visible damage or loose connectors.
If the wiring looks fine and E90 persists, contact a technician for board diagnostics.

One or both control boards will likely need replacing — this is not a DIY repair.

When to Call a Professional

If the wire harness and power supply are fine, the boards themselves are likely faulty. Control board replacement on a washer requires a technician with the correct diagnostic tools.

Frequently Asked Questions

Is E90 the same as E91?

They are related but different. E90 means the boards can't communicate at all. E91 means the boards are communicating but have found a configuration mismatch.

Can a power surge cause E90?

Yes — power surges are a common trigger for communication errors. Plugin your washer into a surge-protected outlet to help prevent this. A surge can damage both control boards simultaneously.

How much does it cost to replace a washer control board?

A replacement control board typically costs $100–$250 for the part. Labor adds another $80–$150 depending on your area. Get a repair quote to decide whether fixing or replacing the washer makes more sense.