ErrorCodeDoctor
Whirlpool · Dryer

Whirlpool Dryer AF / F4 E3 error code

Difficulty: Easy · Cost: $0–$150 · Duration: 15–20m

The AF or F4 E3 code means your Whirlpool dryer detected that airflow through the exhaust system is restricted. This is caused by a clogged lint screen, a blocked or crushed exhaust vent, or a vent with too many turns reducing airflow. The dryer will continue to run while this code is present but drying performance will be poor and overheating is a risk. Touch any key to clear the code and return to the estimated time remaining — but the underlying airflow issue must be addressed to prevent recurrence.

Common causes

  • Lint screen is clogged with lint and has not been cleaned
  • Exhaust vent is blocked with lint buildup inside the duct
  • Exhaust hose is crushed, kinked, or has too many 90-degree bends reducing airflow
  • Outside exhaust vent flapper is blocked with lint or debris

How to fix it

  1. 1

    Remove and thoroughly clean the lint screen — wash with warm water and a soft brush then let it dry before reinstalling

  2. 2

    Check the exhaust hose at the back of the dryer and straighten any kinks or crushes

  3. 3

    Inspect the outside exhaust vent flapper and remove any visible lint or debris

  4. 4

    If the vent duct inside the wall is blocked contact a professional dryer vent cleaning service

  5. 5

    Touch any key to clear the AF or F4 E3 code from the display

  6. 6

    If the code returns after cleaning the vent system contact a qualified technician or schedule service

Related Whirlpool Dryer error codes

1

L2 / F4 E4

Low or no voltage detected on one leg of the power supply — the heater cannot turn on

medium
2

PF

A power failure interrupted the drying cycle

easy
3

Loc

Control Lock has been activated — the dryer will not start or operate

easy
4

F# E# (all other codes)

An internal fault was detected — the dryer control has detected a problem that requires service

hard

AF / F4 E3 error — frequently asked questions

What does the AF / F4 E3 error mean on a Whirlpool dryer?

Restricted airflow detected — the lint screen or exhaust vent is clogged or blocked

What causes the AF / F4 E3 error?

The AF / F4 E3 error is usually caused by: Lint screen is clogged with lint and has not been cleaned; Exhaust vent is blocked with lint buildup inside the duct; Exhaust hose is crushed, kinked, or has too many 90-degree bends reducing airflow; Outside exhaust vent flapper is blocked with lint or debris.

Can I fix the AF / F4 E3 error myself?

Yes — this is rated an easy fix that most people can do themselves, typically in 15–20m.

How much does it cost to fix the AF / F4 E3 error?

Fixing the AF / F4 E3 error on a Whirlpool dryer typically costs $0–$150, depending on parts and whether you do it yourself or hire a technician.

Is it safe to keep using my dryer with the AF / F4 E3 error?

In most cases yes, but it's best to address the AF / F4 E3 error soon — see the fix steps below to resolve it.