Your dryer runs a full cycle. You open the door. Still damp. You run it again. Frustrating — and avoidable.
The machine isn't broken in any dramatic way. Heat is working. The drum is spinning. Something is quietly wrong, and it's almost always one of two things: restricted airflow or a dirty moisture sensor. Here's how to read the signs.
Why Two Cycles Usually Means One Root Cause
A dryer dries by pushing hot, humid air out through the exhaust duct. If that air can't escape efficiently, moisture stays trapped inside the drum. The clothes tumble in warm, damp air and come out warm, damp clothes. The heating element did its job. The vent didn't.
That accounts for roughly 90% of "takes two cycles" calls we see.
The other 10%? A moisture sensor that's lost its calibration. The dryer thinks the load is dry. It isn't.
Start Here: The Vent System
Most people clean the lint trap. That's good — but the lint trap is the beginning of the duct, not the end. The actual blockage builds up in the duct that runs from the back of the machine to the exterior vent on your wall or roof.
That duct can be 5 feet long or 25 feet long. It can have two 90-degree elbows or five. Every foot and every turn reduces airflow. Lint, humidity, and time do the rest.
Check these first:
- The exterior vent flap. Go outside while the dryer is running. The flap should open and you should feel strong, steady airflow. Weak puff? Duct is restricted. No flap movement? Near-total blockage.
- The back of the machine. Pull the dryer forward and look at the flexible transition hose connecting it to the wall. Crushed, kinked, or accordion-style hoses are major restriction points. Smooth rigid metal duct is always better.
- The duct run itself. You won't see inside without a brush kit — but you'll feel it. A fully blocked duct makes the dryer cabinet hot to the touch on the sides. It also trips the thermal fuse faster (that's a separate repair, but a blocked duct is always the cause).
When to call a vent cleaning service vs. a repair tech:
If the duct is simply clogged with lint and the dryer components are all intact, a duct cleaning service ($80–$150 typically) handles it. They run a rotary brush kit through the full run and clear it out. No parts needed.
Call a repair tech if: the exterior vent flap is broken, the transition hose is crushed and needs replacing, the thermal fuse has already tripped (clothes-dryer fully dead, not just slow), or you've cleaned the duct and damp clothes persist.
The Moisture Sensor: Smaller Problem, Easy Fix
Most dryers built in the last 10 years use a moisture sensor — two metal strips inside the drum, usually near the front. Wet clothes conduct electricity between the strips. As the load dries, conductivity drops. When it hits zero, the dryer stops.
Residue from dryer sheets coats those strips over time. The sensor reads "dry" before the load actually is.
The fix: Wipe the sensor strips with a small amount of rubbing alcohol on a cotton ball. The strips are usually 2–3 inches long, positioned parallel to each other along the front drum wall. You'll see them once you know what to look for. One wipe. Dry cycle. Done.
If wiping doesn't solve it, the sensor may need replacement — that's a tech call.
How to Know Which One Is Your Problem
Run the dryer for 10 minutes. Then check two things:
- Open the door and feel the air. If it's barely warm and very humid, airflow is restricted. The heat can't escape.
- Let it run a timed 60-minute cycle (not auto-dry). If clothes come out dry on a timed cycle but damp on auto-dry, the moisture sensor is reading wrong.
Timed cycle = dry → sensor problem. Everything damp regardless of cycle = vent problem.
One Rule Worth Keeping
Clean your exterior vent opening every six months. Check the transition hose every year. That's it. Most dryers that "need repair" just need airflow restored.
If you've done the checks and it's still two cycles every time — call us. We'll find the real problem, quote it upfront, and fix it the same day.