Your dryer runs a full cycle. You open the door. The clothes are warm — but damp. You run it again. Same story. This isn't a minor inconvenience. It's doubling your energy bill and wearing out your machine twice as fast.
The good news: there are really only two things that cause this. Narrow it down fast and you'll know exactly what to do next.
90% of the Time, It's Venting
Heat has to go somewhere. Your dryer pulls moisture out of clothes, converts it to hot humid air, and pushes that air out through a duct to the outside of your home. When that path is blocked — even partially — the wet air has nowhere to go. It recirculates. Clothes stay damp.
The lint trap is the part you see. But the duct behind the machine is where the problem lives.
How to check:
- Pull the dryer away from the wall. Look at the duct — it's usually flexible foil or rigid metal pipe.
- Disconnect it from the back of the dryer. Check for lint buildup inside. A flashlight helps.
- Go outside and find the vent cover on your exterior wall. Open the flap manually. It should move freely. Birds' nests, lint cakes, and stuck flaps are all common blockers.
- Run the dryer for 5 minutes with the duct disconnected. If clothes dry fast — it's 100% venting.
What to do about it:
A clogged duct needs a vent cleaning service — not an appliance tech. A vent cleaner uses a rotary brush and vacuum to clear the full run of duct from dryer to exterior. This costs less than a repair call and takes under an hour. Do it once a year. Twice if you run the dryer daily.
If the duct is crushed, kinked, or too long (over 25 feet of equivalent length), that's a bigger problem. Foil flex duct also collapses over time — rigid metal is the correct replacement. A vent cleaner can assess this on-site.
One more thing: if your exterior vent cover is the old louvered type, swap it for a single-flap cover. Louvers trap lint and restrict airflow even when "clean."
10% of the Time, It's the Moisture Sensor
Modern dryers don't run on a fixed timer. They use moisture sensor bars — two thin metal strips, usually inside the drum near the lint trap — to detect when clothes are dry. When the sensor reads "dry," the dryer stops.
If the sensor bars are coated with dryer sheet residue (common with fabric softener sheets), they misread. The dryer thinks clothes are dry before they are. It shuts off early. You run it again.
How to check:
Look inside the drum, just past the lint trap opening. You'll see two parallel metal bars, roughly 2–3 inches long. If they look dull, gray, or filmed over — that's residue.
The fix:
Wipe both bars with a cotton ball soaked in rubbing alcohol. Let them dry fully before running a load. No tools required. Takes 2 minutes.
If cleaning doesn't help, the sensor itself may be faulty. That's a tech call — the bars need to be tested for resistance and replaced if they're reading out of spec.
When to Call a Vent Cleaner vs. a Repair Tech
| Symptom | Who to Call | |---|---| | Duct full of lint, exterior vent blocked | Vent cleaning service | | Duct crushed, kinked, or wrong material | Vent cleaning service (they replace it) | | Sensor bars dirty | Clean yourself (rubbing alcohol) | | Cleaning sensor didn't help | Appliance repair tech | | Dryer makes noise, runs hot, trips the breaker | Appliance repair tech | | No heat at all | Appliance repair tech |
Two cycles for one load is almost always a vent problem. Check there first. It's the faster fix, it's the cheaper fix, and it's the one people skip because it's behind the machine where you can't see it.
If venting checks out clean and the sensor fix doesn't hold — that's when you call us. We'll test the sensor, the heating element, the thermostat, and the cycling circuit. Most dryer repairs are done in one visit.
Same-day service available in Miami-Dade, Broward, and Palm Beach counties. Call 786-869-3888 — we're open every day.