How to Fix a Dryer That Won't Heat Up

A dryer that won't heat is usually caused by a clogged lint filter, blocked exhaust vent, faulty heating element, or tripped thermal fuse.

  1. Clear the First Blockage. Remove the lint filter from inside the dryer door or on top of the unit. Clean off all visible lint with your hands, then rinse under warm water with a soft brush to remove fabric softener buildup. Let it air dry completely before reinstalling. A clogged filter restricts airflow and prevents proper heating.
  2. Find the Vent Obstruction. Go outside and locate where your dryer vents. Remove any visible lint or debris from the exterior vent cover. If you see significant buildup, the entire vent duct may need professional cleaning. A blocked exterior vent causes the dryer to overheat and shut down the heating element as a safety measure.
  3. Replace the Safety Fuse. Unplug the dryer and remove the top or rear panel to access the thermal fuse, usually located on the blower housing. Remove the fuse and test it with a multimeter for continuity. If there's no continuity, replace the fuse. This safety device cuts power to the heating element when the dryer overheats and must be replaced, not reset.
  4. Diagnose Element Failure. Locate the heating element housing, typically at the rear of electric dryers. Remove the element and visually inspect for breaks or damage in the coil. Test with a multimeter for continuity between terminals. A broken element will show no continuity and needs replacement. Handle carefully as elements are fragile.
  5. Check Gas Flow First. For gas dryers, ensure the gas valve is fully open and check that other gas appliances are working. Listen for the sound of gas igniting when the dryer starts. If you smell gas or suspect a leak, stop immediately and call a professional. Gas igniter problems require professional diagnosis.
  6. Test Temperature Control. The cycling thermostat regulates dryer temperature and may fail in the open position, preventing heating. Locate it near the heating element, remove it, and test for continuity with a multimeter. Replace if it shows no continuity at room temperature.