Whirlpool Dryer Not Collecting Lint? What Whirlpool Says to Check

Whirlpool dryer not collecting lint? Follow Whirlpool's own checks: lint screen seating and residue, vent airflow, load size, cycle choice and fabric type.

Whirlpool’s Product Help article “Not Collecting Lint — Dryer,” filed under Laundry → Dryers → Dryer → Drying Performance, lists six questions to work through when lint is not collecting in the filter: whether the lint screen is inserted correctly, whether it is clogged or dirty, whether the venting system is blocked, whether the dryer is overloaded, which cycle was selected, and what type of items were being dried. Its separate “Long Dry Times — Dryer” page carries the venting detail and the AF (“Check Vent”) code.

This page restates those two Whirlpool pages for Whirlpool dryers. The steps are Whirlpool’s; for model-specific instructions, confirm against your model’s manual. Informational only.

Safety: the checks here are Whirlpool’s — the lint screen, the venting system, the load, the cycle and the fabric type. Whirlpool’s vent instructions include hiring a professional to clean the vent hose, and its vent testing kit page says the kits are designed to assess the dryer vent system, ensure airflow and reduce the risk of fire hazards. Whirlpool’s pages end with its service route.

1. Is the lint screen inserted correctly?

Whirlpool’s first check is the lint screen’s seating. It states that the lint screen must be used during each load and that if it is not seated correctly, the lint might not be captured. The instruction is to remove the lint screen and reinsert it, ensuring it is fully inserted.

2. Is the lint screen clogged or dirty?

Whirlpool says the lint screen should be cleaned regularly to remove the buildup of laundry products. Its instruction: remove the lint, then wash the trap with warm water and soap to remove any buildup of detergent residue, which Whirlpool says can reduce the screen’s effectiveness. Dry the screen completely before replacing it.

Whirlpool’s “Long Dry Times — Dryer” page adds more detail. The lint screen is located either on top of the dryer or in the door opening, and a screen blocked by lint can increase drying time; Whirlpool says to clean the lint screen after every use. It also notes that if you use fabric softener regularly, the screen may have residue build-up that may not be visible, and that this residue should be cleaned occasionally for better drying performance.

3. Is the venting system blocked?

Whirlpool says the entire venting system must be cleaned regularly and kept free of any obstruction. Its test: run the dryer for 5–10 minutes, then hold your hand under the outside exhaust hood to check the air movement. If the air movement is weak, Whirlpool says to clean the lint from the entire length of the system and the exhaust hood. It gives two options for that work — a vent cleaning brush, or hiring a professional to clean the vent hose and ensure no blockage.

4. The rest of the vent path

Whirlpool’s “Long Dry Times — Dryer” page covers the vent hardware itself:

Crushed vent. Whirlpool notes the dryer may get pushed back into the venting material and the venting can get crushed behind the dryer.
Vent material. Rigid or flexible metal venting is recommended by Whirlpool. Other materials, such as aluminum foil or plastic, are not recommended because, in Whirlpool’s wording, they can collapse or be crushed.
Diameter. Whirlpool says to use only 4” diameter heavy metal exhaust vent material, and that larger or smaller diameter material will reduce air movement and cause longer drying times.
Exhaust hood. Exhaust hoods must be at least 12” (305 mm) from the ground or any object that may obstruct exhaust, such as flowers, rocks, bushes or snow. Whirlpool notes debris such as animal nests can obstruct the venting, and says to clear all debris from the hood and attached venting.
Length and elbows. Venting from the dryer to the home’s exterior should be as straight and short as possible. Whirlpool states that increased length and elbows can reduce airflow and encourage lint build-up.
Cleaning interval. Whirlpool says the venting from the dryer to the outside of the home must be cleaned every one to two years, or as needed when dry performance has decreased.

5. Is the dryer overloaded?

If you are overloading the dryer, Whirlpool says the airflow may be restricted and lint may not have a chance to be collected properly in the filter. Its suggestion is to try drying smaller loads to see if lint collection improves.

6. Which cycle was selected?

Whirlpool says to make sure the correct drying cycle is selected. It notes that some cycles, especially on energy-efficient dryers, are designed to remove moisture in a way that could prevent lint from being collected in the filter. Its test is to try a high heat or normal cycle to see whether lint collection improves.

7. What type of items were being dried?

Whirlpool says certain types of clothes and fabrics are more likely to produce lint in the dryer, and it splits them into two lists.

Non-lint producers

Silk. Whirlpool describes silk fibers as smooth and slow to shed, which it calls low lint production. Handle silk carefully, as Whirlpool notes it can be delicate.
Linen. Whirlpool describes linen fibers as long and not prone to creating lint in the dryer, and suggests air-drying linen or using a low setting to avoid excessive wrinkling.
Nylon. Nylon is a synthetic fiber with smooth, strong fibers that do not shed much lint. Whirlpool suggests washing nylon separately from fabrics such as cotton or fleece, because it can attract lint from other materials.

Heavy lint producers

Cotton. Whirlpool says cotton fibers break off more easily during drying, leading to lint generation, and suggests drying cotton items in smaller loads to improve lint collection.
Fleece. Fleece is made of synthetic fibers that shed easily during drying; Whirlpool notes it is especially prone to linting when new, and suggests washing fleece items separately to avoid transferring lint.
Wool. Whirlpool says wool fibers shed when agitated in the dryer, which can result in lint buildup, and suggests drying wool items on a low or air-dry setting to minimize lint and avoid damage.

8. What “AF” or “Check Vent” means

Whirlpool’s “Long Dry Times — Dryer” page explains the display: an AF (Restricted Air Flow) or “Check Vent” error code indicates that the lint screen or vent is clogged, or that the vent is crushed, kinked, or has too many turns. Whirlpool says the dryer will continue to run when the error is present. To clear the code, touch any key; Whirlpool says the display returns to the estimated time remaining.

9. Whirlpool’s dryer vent testing kit

Whirlpool offers a dryer vent testing kit, part #W11224254. Its page says to visit its Dryer Test Kit page or Contact Us to purchase the part. Whirlpool describes the kits as designed to help assess the performance of the dryer vent system, ensuring optimal airflow and reducing the risk of fire hazards. It adds that additional replacement parts can be purchased at Whirlpool Purchase Genuine Parts.

10. When to call for service

Both of Whirlpool’s pages close with the same route: contact Whirlpool or schedule service from its preferred list of service providers. Whirlpool’s Manuals & Service section says to use your model number to locate resources such as product manuals and documents.

FAQ

Q: Why is my Whirlpool dryer not collecting lint? A: Whirlpool’s “Not Collecting Lint — Dryer” page lists six checks: the lint screen’s seating, a clogged or dirty screen, a blocked venting system, an overloaded dryer, the selected cycle, and the type of items being dried. Its “Long Dry Times” page adds the AF (“Check Vent”) code and the vent-hardware checks covered above.

Q: Where is the lint screen on a Whirlpool dryer? A: Whirlpool says the lint screen will be located either on top of the dryer or in the door opening.

Q: What lint screen cleaning interval does Whirlpool give? A: Whirlpool’s “Long Dry Times” page says to clean the lint screen after every use. The “Not Collecting Lint” page says to wash the trap with warm water and soap when laundry-product residue builds up, and to dry it completely before replacing it.

Q: What does AF or “Check Vent” mean? A: Whirlpool says an AF (Restricted Air Flow) or “Check Vent” code indicates the lint screen or vent is clogged, or that the vent is crushed, kinked or has too many turns. The dryer continues to run with the code present; touching any key clears it and returns the display to the estimated time remaining.

Q: Can overloading change how much lint the filter catches? A: Whirlpool says overloading the dryer may restrict airflow, so lint may not have a chance to be collected properly in the filter. It suggests trying smaller loads.

Q: Does the fabric type affect lint collection? A: Whirlpool lists silk, linen and nylon as non-lint producers, and cotton, fleece and wool as heavy lint producers. It gives handling notes for each: silk carefully, linen air-dried or on low, nylon washed separately, cotton in smaller loads, fleece washed separately, and wool on low or air-dry.