Whirlpool Dryer F4E3 Error — Restricted Air Flow Fix

What it means

Whirlpool dryer F4E3 is the restricted-air-flow code on newer Whirlpool dryers with dot-matrix displays.
Whirlpool's exact wording: 'An F4 E3 (Restricted Air Flow) error code indicates that the lint screen or vent is clogged; the vent may be crushed, kinked, or have too many turns.'
Same fault as AF on older Whirlpool dryers — same fix.

Affected Models

Whirlpool WED4815 / WED4850 / WED5000 series electric dryers
Whirlpool WED7120 / WED8120 / WED9620 Cabrio series
Whirlpool WGD4815 / WGD5000 / WGD7120 series gas dryers
Whirlpool Compact Heat Pump dryers (WHD862, WHD560)
Same F+E codes appear on Maytag, KitchenAid, and Amana dryers (shared platform)

Common Causes

Lint screen clogged
Exhaust vent crushed or kinked behind the dryer
Vent run exceeds Whirlpool's recommended length and elbow specs
Exterior vent hood blocked or flap stuck closed
Dryer sheet residue blocking airflow through the lint screen

How to Fix It

Clean the lint screen.

Pull the lint screen out and clear all visible lint by hand.
If you use dryer sheets, hold the screen up to a light — if you can't see clearly through it, residue is blocking airflow.
Rinse under warm water and let it dry fully before reinstalling.
Check for crushed or kinked vent.

Pull the dryer out an inch and look at the flex duct between the dryer and the wall.
Sharp bends, crushed sections, and overly-long runs all restrict airflow.
Straighten the duct or replace any crushed sections with new aluminum flex.
Confirm the full vent run is clear.

Whirlpool: 'confirm vent is free of lint and debris, verify exterior vent hood is clear.'
If your exhaust runs more than 25 feet or has 3+ elbows, hire a professional vent cleaning service — household vacuums don't reach buildup in long runs.
Confirm the run meets Whirlpool's specs.

Whirlpool: 'Confirm vent system meets recommended run length and elbow specifications.'
Maximum recommended is typically 25 feet for rigid metal duct, less for flex (each 90° elbow counts as 5 feet equivalent).
If your install exceeds the spec, F4E3 will keep returning until the run is shortened or boosted with a duct booster fan.
Restart with Timed Dry.

Whirlpool: 'Select a Timed Dry heated cycle and restart.'
The dryer keeps running when F4E3 displays — touching any key clears the code temporarily so you can complete the cycle while you plan the cleaning.

When to Call a Professional

F4E3 is owner-fixable through cleaning.
Only schedule service if the lint screen is clean, the full vent run is clear, the exterior hood opens freely — and F4E3 still appears.

Frequently Asked Questions

How is F4E3 different from AF?

Same fault, different display.
F4E3 appears on newer Whirlpool dryers with dot-matrix displays that show the full F+E format.
AF appears on older Whirlpool dryers with simpler 3-character displays.
Whirlpool's troubleshooting steps for both are word-for-word identical — same lint screen check, same vent inspection, same cleaning procedure.