Dryer problem
Why is my dryer not heating?
On an electric dryer, check the breaker first: a half-tripped double breaker lets the drum turn without heat. After that, the usual causes are a blown thermal fuse or a failed element. On a gas dryer, the igniter and valve coils fail most. Restricted venting is often the root cause.
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Power, protection, heat source, airflow: dryer not heating
A dryer needs full power, intact safety fuses and thermostats, a working heat source and free airflow. Check them in that order.
- Power
- Electric dryers need both halves of a 240-volt circuit to heat.
- Protection
- Thermal fuse and thermostats cut heat when the dryer overheats.
- Heat source
- Element on electric; igniter, flame sensor and valve coils on gas.
Signs and causes: dryer not heating
| Sign | Likely cause | What fixes it |
|---|---|---|
| No heat, very weak exhaust airflow | Blocked vent, blown thermal fuse | Vent cleaned, fuse replaced |
| Gas igniter glows, no flame | Gas valve coils | Coils replaced |
| No igniter glow | Igniter, flame sensor or fuse | Part tested and replaced |
| Some heat, long dry times | Partial vent blockage or failing element | Vent cleaned, element tested |
Safe checks: dryer not heating
Breaker
Reset the double breaker fully off, then on.
Lint screen
Clean it and check the housing beneath it.
Exterior hood
Check for strong airflow outside.
Gas supply
Make sure the gas valve to the dryer is open and other gas appliances work.
Urgency: dryer not heating
- Act now
Burning smell or very hot cabinet
Stop using it until inspected.
- This week
No heat, no smell
Book a dryer repair and a vent cleaning.
Avoid: dryer not heating
Bypassing a thermal fuse
It is a fire safety device. Replace it and fix the airflow cause.
Running repeated cycles to dry
Overheats a restricted dryer further.
Why the fault often comes back
The thermal fuse is a one-time safety device. It blows when the dryer overheats, and the most common reason a dryer overheats is restricted exhaust: a crushed transition duct, a long vent packed with lint, or a blocked hood outside. Replacing the fuse without fixing the airflow usually means the new fuse blows within weeks.
That is why a good repair visit checks the airflow at the outside hood as well as the heat circuit. If the vent run is long, goes through the roof or has not been cleaned in years, book a dryer vent cleaning alongside the repair. On gas dryers, an igniter that glows but never lights the burner points to the valve coils, which are a separate, simple part.
Questions people ask: dryer not heating
How do I know if the thermal fuse is blown?
A technician tests it for continuity. On some models a blown fuse stops the dryer starting at all; on others only the heat stops.
Can a dryer vent cause no heat?
Yes. A blocked vent overheats the dryer, which blows the fuse or trips a limit thermostat.
Is it safe to use a dryer without heat?
Air-only cycles are fine if there is no burning smell, but find the cause soon.
Can a dryer heat on one cycle but not another?
Yes. Some dryers use different thermostats or element sections for different heat settings. A dryer that heats on high but not on low points to a specific thermostat or element section.
This page is general safety information, not a diagnosis. Appliances combine electricity, water and sometimes gas. If you are unsure whether something is safe, unplug it or switch it off at the breaker and have a technician inspect it. For a gas smell, leave and call 911 or the gas utility.
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- What is happening, any error code, and whether water or gas is involved
Gas smell, smoke or flames: leave and call 911 or the gas utility first.