AF can mean restricted airflow / dryer duct obstruction in the official Whirlpool dryer guidance linked below. The same display may mean something different on another model, so check the full model number and the context in which it appeared.
Stop use and check safety first
Stop using the appliance if there is smoke, burning smell, gas odor, water near electrical parts, or overheating.
Read the display exactly
Recorded display variants in this source group: AF, F4E3, F4 E3. Keep capitalization, spaces, and any slash or suffix in your notes. These are documented variants within this group, not proof that every version appears on every model.
Product scope: any. When it appears: Consult the owner manual for the display context and control-panel generation.
Safe checks before service
- Stop the dryer if it is unusually hot, smells burnt, or shows a serious blockage warning.
- Clean the lint screen and check visible, reachable exhaust duct openings for obvious obstruction.
- Have a qualified dryer-vent professional clean inaccessible ductwork; do not restart a dangerously overheating dryer.
Do only user-facing checks allowed by your owner manual. Do not bypass locks, open electrical compartments, work on gas lines, or cut into the refrigerant system.
When to stop checking
If the code remains after safe external checks, contact the manufacturer or a qualified technician. If a hazard is present, stop use first. Keep the displayed code and context available for support.
Use the DIY or service decision guide · Find manufacturer service · Prepare a service checklist
Official source and model check
Source scope: manufacturer category general. Reviewed 2026-11-02. This page does not establish that the code applies to a specific model. Find the full model and suffix on its label, then read that model’s official manual.