Direct answer
On the covered Whirlpool dryer, AF, Check Vent means Whirlpool's Check Vent indicator shows airflow status through the dryer and vent system on Automatic Cycles on certain models. It lights during the sensing phase at the start of a cycle if a blocked vent or low airflow is detected, and stays on for the whole cycle. First, clean the lint screen, then inspect the full vent run for crushing, kinking or blockage.
Definition versus diagnosis
The display names a detected condition—not an automatically failed part.
What this covers
- Whirlpool dryer covered by the cited source
- Displayed code or documented alias: AF, Check Vent
- The exact operating state described by the manufacturer
What it does not cover
- ×Another product type or original-manufacturer platform
- ×A visually similar but different code
- ×Internal live electrical, sealed-system, gas, battery-cell or control-board repair
Match every character and the exact product
ReversiblePhotograph the complete display and product label. This record covers AF, Check Vent on Whirlpool electronic-control dryers. Code availability varies by model and fuel type; a gas dryer and an electric dryer of the same series do not display the same set of codes.
Preserve the failure state
ReversibleClean the lint screen, then inspect the full vent run for crushing, kinking or blockage. Record the operating stage, recent change and what still works before clearing the message.
Correct only the documented fault domain
ReversibleWhirlpool notes the light clears at cycle completion, on touching Power, or on opening the door — clearing the light is not clearing the restriction. Do not borrow a reset or meaning from a similar code, product or model year.
Verify once, then respect the service boundary
ReversibleRepeat only the shortest safe action that reaches the original stage. If AF, Check Vent returns, stop repeated resets and use model-specific manufacturer support.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Exact questions
Common follow-ups
What does AF, Check Vent mean on a Whirlpool dryer?+
Whirlpool's Check Vent indicator shows airflow status through the dryer and vent system on Automatic Cycles on certain models. It lights during the sensing phase at the start of a cycle if a blocked vent or low airflow is detected, and stays on for the whole cycle.
Can I reset AF, Check Vent without fixing the cause?+
A reset may hide the display temporarily but does not correct the documented fault. Record the code and complete only the safe checks first.
Why is the complete model number required?+
Manufacturers reuse characters across platforms. The model number determines which official table, controls and service boundary apply.
When should I stop?+
Stop for smoke, arcing, burning odor, uncontrolled water, gas odor, battery swelling, extreme heat or any condition the manufacturer directs to professional service.
Answer for the exact device and software version shown above.