Dryer not heating? 7 things to check
If the drum turns but the clothes stay damp and cold, start here. Unplug the dryer (and turn off gas) before inspecting anything inside.
Updated October 2026.
1. The breaker (electric dryers)
Electric dryers use a 240-volt double breaker. If one half trips, the drum may still turn while the heater gets no power. Switch the breaker fully off, then on.
2. The gas supply (gas dryers)
Make sure the gas valve behind the dryer is open (handle parallel to the pipe) and that other gas appliances are working.
3. The settings
"Air fluff" or "no heat" cycles don't heat. Try a normal timed dry on high.
4. The lint screen
A clogged screen restricts airflow and can trip safety devices. Clean it every load, and wash it with soapy water occasionally if dryer sheets leave a film.
5. The vent
Go outside while the dryer runs. The exhaust flap should open with strong airflow. Weak airflow means a clogged or crushed vent, which causes long dry times and, eventually, a tripped thermal fuse, and is a fire risk. Clean the full vent run, and replace foil or vinyl ducting with metal duct.
6. The thermal fuse
When a dryer overheats (usually from a blocked vent), a one-time thermal fuse blows and cuts heat or all power. Replacing the fuse without fixing the airflow problem means it will blow again.
7. Heating parts
- Electric: the heating element, high-limit thermostat and cycling thermostat
- Gas: the igniter (should glow), flame sensor and gas valve coils
These require a multimeter and some disassembly. If you're not comfortable, this is where a technician comes in.
Safety reminder
Stop using the dryer and call for service if you smell burning or gas, see scorch marks on clothes, or the cabinet feels very hot.