When a dryer tumbles but produces no heat, your clothes come out damp no matter how long the cycle runs. Here are the 6 most common reasons a dryer won't get hot and how to fix each.
Safety first: Unplug an electric dryer (or shut off the gas and unplug a gas dryer) before testing any component.
1. Blown thermal fuse
The thermal fuse is a safety device that cuts power to the heat when the dryer overheats — usually because of a clogged vent. A blown thermal fuse is the single most common cause of "runs but no heat."
- Test it with a multimeter for continuity; replace if it's blown.
- Important: always clear the vent too, or the new fuse will blow again.
2. Clogged dryer vent
Restricted airflow makes the dryer overheat and trips the safety devices. A clogged vent is also a fire hazard. Clean the lint trap every load and the full vent line at least yearly — see How to Clean a Dryer Vent.
3. Faulty heating element (electric dryers)
The heating element produces the heat. Over time coils burn out or short. Test for continuity; a broken element won't heat and must be replaced.
4. Tripped breaker / partial power (electric dryers)
Electric dryers use 240V — two breakers. If one trips, the dryer runs but won't heat (the motor uses 120V, the heat needs the full 240V). Reset both breakers.
5. Faulty thermostat or thermistor
The cycling thermostat and high-limit thermostat regulate temperature. A failed thermostat can cut the heat entirely. Test with a multimeter and replace as needed.
6. Gas supply or igniter (gas dryers)
On a gas dryer, no heat can mean the gas is off, a failed igniter, or a bad gas valve solenoid. Confirm the gas supply first, then have the igniter/solenoid tested.
When to call a professional
Testing 240V circuits, gas valves, and igniters can be dangerous. If you've cleared the vent and the dryer still won't heat, True Appliance Repair connects you with same-day technicians for Samsung, LG, Whirlpool, Maytag, and more. Call 1-888-298-3714.
Frequently Asked Questions
Why does my dryer run but not heat? Most often a blown thermal fuse (from a clogged vent), a failed heating element, or — on electric dryers — a tripped breaker leaving only 120V. Gas dryers may have an igniter or gas-supply issue.
Can a clogged vent stop a dryer from heating? Yes. Restricted airflow makes the dryer overheat and trip the thermal fuse or thermostat, cutting the heat. Always clean the vent when replacing these parts.
How much does it cost to fix a dryer that won't heat? Common parts like a thermal fuse or heating element typically run $89–$299 installed, depending on the brand and part.