Whirlpool dryer takes two cycles to dry one load

Clean the whole path, not just the screen

Take the lint screen out and hold it under a running tap. If the water sits on top instead of running through, there is a film of fabric softener across it and the screen is restricting air even though it looks clean. Wash it with a brush and let it dry. Then pull the machine out and look at the duct behind it: flexible foil crushed into an S-bend behind a dryer pushed back into a closet is the single most common restriction we find. Finally, go outside and check the flap actually opens when the dryer runs. It often does not.

What it usually means, by the kind of machine

Whirlpool sells one appliance in several forms — a top-loader with an agitator and one without, a front-loader, a stacked pair, a laundry tower and an all-in-one; a vented dryer, a ventless one and a heat pump — and the same behavior points at different things on each of them. A top-load washer has no drain pump filter to open and a front-loader does, which is the whole first hour of the same complaint on two machines.

• Electric — Dries by heating air over an element and moving it through the drum. When the air cannot leave, the cycle keeps running and the clothes stay damp.
• Gas — Same air path, different heat source. A gas dryer with a restricted vent can also short-cycle its own burner, so the drum is hot and then not hot.
• Compact heat pump — Vents nothing outside and pulls water into a tank instead. Here the equivalent restriction is a full water tank, a blocked bottom filter or a condenser that needs cleaning, and Whirlpool documents each.

Where this goes wrong in South Florida

Two local habits make dryer venting worse here than the design allows for. The first is the laundry closet: a stacked pair or a dryer in a hallway alcove, ducted through the ceiling or around two corners to an outside wall, with flexible foil that gets crushed every time the machine is pushed back. The second is the humidity. A dryer takes several pounds of water out of a load and has to put it somewhere; on a day when the outside air is already saturated, a marginal vent stops coping entirely. The same machine that was fine in February needs two cycles in August, and nothing about it has changed except the air.

Why we look at the vent before the dryer

Whirlpool names the vent first on its own AF page, and we follow that order for two reasons. It is the most common cause by a distance, and it is the one that matters for safety: lint packed in a duct behind a running heater is how laundry fires start. A vent clean is cheap next to an element or a control board, and if the machine still cannot dry after the path is clear, we have removed the biggest variable before spending anything.