Dryer Not Heating: Step‑By‑Step Troubleshooting Guide

If your dryer runs but doesn’t heat, the issue is usually simple to diagnose. This guide covers the most common causes for both electric and gas dryers, including heating elements, thermal fuses, vents, and power supply problems.

1. Check the Power Supply (Electric Dryers)

Electric dryers require 240V. If one leg of the breaker trips, the dryer may run but not heat.

Check your electrical panel for a tripped double‑pole breaker.
Reset the breaker fully to the OFF position, then back ON.

For more electrical troubleshooting, see:
Breaker Keeps Tripping

2. Inspect the Lint Filter and Vent

A clogged vent restricts airflow and prevents the dryer from heating properly.

Clean the lint filter thoroughly.
Disconnect the vent hose and check for blockages.
Inspect the exterior vent flap for proper airflow.

3. Check the Thermal Fuse

The thermal fuse is a safety device that blows when the dryer overheats.

Unplug the dryer.
Locate the thermal fuse (usually on the blower housing).
Test for continuity with a multimeter.
Replace if blown — and clean the vent to prevent repeat failures.

4. Test the Heating Element (Electric)

A failed heating element is one of the most common causes of no heat.

Unplug the dryer.
Remove the rear panel.
Test the heating element for continuity.
Replace if open or visibly damaged.

5. Check the Gas Ignition System (Gas Dryers)

If the dryer tumbles but doesn’t heat, the issue may be with the ignition system.

Watch for the igniter glowing.
If it glows but no flame appears, the gas valve coils may be faulty.
If it doesn’t glow at all, the igniter may be bad.

6. Inspect the Cycling Thermostat

The thermostat regulates temperature. If it fails, the dryer may not heat.

Test for continuity.
Replace if defective.

7. When to Call a Professional

Call an appliance technician if you notice:

Burning smells
Repeated blown fuses
No heat after replacing the heating element
Gas ignition issues you’re not comfortable diagnosing