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Maytag Dryer Error Code AF (Airflow Fault)

AF means the dryer detected restricted exhaust airflow, almost always a clogged lint screen or blocked vent.

Risk: High

Meaning

AF stands for Airflow Fault. The dryer’s sensors detected that air isn’t moving through the exhaust system the way it should, and a clogged lint screen or blocked vent hose is behind nearly every case.

The information provided here is a diagnostic aid and does not replace the intervention of a qualified professional.

Possible causes

No cause is certain until it has been checked on the appliance.

Very likely Lint screen clogged or not fully seated
Very likely Exhaust vent hose clogged with lint
Likely Vent hose crushed, kinked, or too long
Possible Outside vent cap blocked or flap stuck closed

Tools needed

Vacuum with crevice tool
Long-handled lint brush
Screwdriver
Foil tape

First checks

Remove and clean the lint screen, then confirm it sits flush when reinserted.
Disconnect the vent hose from the back of the dryer and check it for lint buildup.
Check the full vent run to the exterior wall cap for kinks or crushed sections.
Confirm the exterior vent hood flap opens freely when the dryer runs.

Step-by-step diagnosis

Clean the lint screen and reseat it. It has to sit flush. A screen left standing proud lets lint bypass straight into the blower housing.
Vacuum the screen housing as deep as the crevice tool will go.
Pull the dryer forward and disconnect the vent at the back.
Brush out the hose and the wall duct, then vacuum the debris you have loosened rather than pushing it further along.
If the hose is foil or plastic accordion, replace it with rigid or semi-rigid metal. Every ridge in accordion hose holds lint, and it is the most common reason AF comes straight back.
Check the outside hood. The flap should open when the dryer runs and fall shut when it stops.
Reconnect with foil tape rather than screws. Screw tips project into the duct and catch lint.
Run a timed dry and confirm strong warm air at the exterior hood.

What not to do

Ignoring a repeat AF code, each recurrence means the fire risk from lint buildup is ongoing.
Using screws to attach vent sections, they catch lint and accelerate clogging.

When to stop

AF persists with a short, clean, rigid duct.
You find scorched lint or smell burning. This code is safety related, so stop using the dryer until it is checked.
The duct runs through a wall or roof space you cannot open up.

An error code varies by brand

The same code can have a different meaning depending on the brand and model. Always check your appliance's manual before acting.

Related guides

When to call a professional

If the simple checks turned up nothing, if the repair involves electricity, gas, or the sealed refrigerant system, or if you have any doubt at all: stop there and hand the appliance over to a qualified technician.