Dryer Overheating or Shutting Off Mid-Cycle
Likely causes
- ✓Clogged lint screen or exhaust duct restricting airflow
- ✓Blocked outside vent hood
- ✓Failing thermostat or thermal cutoff fuse
- ✓Airflow restriction inside a long or crushed duct run
- ✓Malfunctioning cycling thermostat
The short answer: a dryer that overheats or quits mid-cycle isn’t getting enough airflow. The lint screen and the duct are the first things to check.
A restricted vent is also a fire risk.
What usually causes it
- Clogged lint screen or duct. Restricted airflow is the most common cause, and it traps heat inside the dryer.
- Blocked outside vent hood. Lint and debris can jam the flap where the air exits the house.
- Failing thermostat or thermal fuse. These can trip too early or read the temperature wrongly.
- Long or crushed duct run. Long, kinked or bent ducts slow the air and make the dryer run hot.
- Cycling thermostat fault. It can fail to shut the heat off or turn it back on correctly.
What you can check yourself
- Clean the lint screen every load. Wash it with warm water now and then, since softener residue can block airflow.
- Clear the duct. Unplug the dryer, pull it out and remove lint from the duct, replacing any crushed or kinked sections.
- Check the outside vent. With the dryer running, you should feel strong airflow and see the flap open.
- Don’t overload it. A packed drum restricts airflow.
How to prevent it
- Clean the lint screen every load, and rinse it occasionally to remove softener film.
- Keep the duct short, straight and made of smooth metal.
- Clear the outside vent hood each season.
When to call a technician
Call us if:
- The screen and duct are clear and it still shuts off
- Clothes come out scorching hot
- You smell burning
These repairs involve live voltage, gas or hidden parts, so we recommend leaving them to a professional.
Service call: $89, waived when you go ahead with the repair. Warranty: 90 days on every repair.
Frequently asked questions
Why does my dryer shut off before the clothes are dry?
Most dryers have safety thermostats that shut the heat off when they get too hot. A restricted vent or a worn thermostat is the usual reason.
Is an overheating dryer dangerous?
It can be. Lint is flammable, and a blocked vent that keeps the dryer hot is a fire risk. Stop using the dryer if clothes come out scorching hot or you smell burning.
How often should I clean my dryer vent?
About once a year for most households, and more often if you dry large loads or the dryer takes longer than it used to.
This is one of the issues covered under our Dryer Repair service.