Dryer not heating or taking forever to dry?
Quick answer
If the dryer tumbles but clothes stay damp, the problem is heat or airflow. The number-one cause — and a genuine fire hazard — is a clogged lint screen and vent duct restricting airflow. After that: a tripped breaker (electric dryers run on a double breaker, and losing one leg means it tumbles with no heat), a blown thermal fuse, or a failed heating element or gas igniter. Clean the lint screen and the full vent first; it fixes many cases and prevents fires.
Common causes
- A clogged lint screen and vent duct — restricts airflow, causes overheating, and is a leading cause of house fires.
- A tripped half of a 240V double breaker (electric dryers) — the drum turns but there's no heat.
- A blown thermal fuse from a previous overheat.
- A failed heating element (electric) or igniter/gas valve (gas).
- Overloading, which slows drying even when everything works.
What to check first
- Clean the lint screen (every load) and then clean the vent duct all the way to the exterior hood.
- Step outside while it runs — weak or no airflow at the vent hood confirms a blockage.
- Check the breaker: on an electric dryer, reset both halves of its double breaker (one tripped = heat loss).
- Reduce the load size and see if drying time improves.
- Note the pattern: no heat at all vs. takes two cycles points toward different parts.
When it's urgent
A clogged dryer vent is one of the most common causes of home fires — if the dryer is hot to the touch, smells burning, or the vent is packed with lint, stop using it and clean the vent before running it again. Unplug an electric dryer or shut off a gas dryer before any inspection.
DIY vs. call a pro
You can likely DIY
- Cleaning the lint screen and the full vent duct to the outside.
- Resetting the dryer's breaker(s) and reducing load size.
- Confirming airflow at the exterior vent hood.
Call a pro for
- Replacing a heating element, thermal fuse, or thermostat.
- Gas igniter, gas valve, or any gas-related repair.
- Electrical faults or a dryer that overheats after a vent cleaning.
Estimated cost range
How HouseCue helps
HouseCue is a private, homeowner-first app that turns this from a one-time worry into a tracked plan. Snap a photo for an AI diagnosis, upload your inspection report to auto-build a handbook, and get seasonal reminders for your roof, HVAC, water heater, plumbing, and electrical — so nothing slips. Connecting with a pro is always optional and only when you choose.
Get started freeFrequently asked questions
Why is my dryer running but not heating?
Common causes are a clogged vent restricting airflow, a tripped half of the dryer's double breaker (electric), a blown thermal fuse, or a failed heating element or gas igniter. Clean the lint screen and vent first, then check the breaker; persistent no-heat usually needs a part replaced.
Why does my dryer take two cycles to dry clothes?
Almost always restricted airflow — a clogged lint screen or vent duct, or an overloaded drum. Moist air can't escape, so clothes stay damp. Clean the full vent run to the outside and try smaller loads before assuming a part failed.
Is dryer lint really a fire hazard?
Yes. Lint is highly flammable, and a clogged vent traps heat — dryer fires send thousands of people to the hospital each year. Clean the lint screen every load and the vent duct at least annually.
Related guides
HouseCue guides are general educational information, not professional inspection, engineering, or contracting advice. Costs vary by market. For safety issues — gas, electrical, structural, or major water — contact a qualified professional.