Why is my dryer not heating?
Updated August 2026
A dryer that tumbles clothes fine but leaves them cold is nearly always a thermal fuse tripped by a clogged lint vent: when the exhaust cannot escape, the cabinet overheats and the one-time safety fuse cuts the heat to protect the machine. Clearing the full vent run and replacing that $10–30 fuse fixes it more often than any other repair. If the exhaust is clean and it still runs cold, work down the causes below, which move from most to least common.
Safety first: lint restriction is the leading cause of dryer fires, so treat a blown thermal fuse as a symptom, not just a part to swap. If the vent that overheated the machine is not cleaned end to end, the same lint that tripped the fuse can ignite. Unplug an electric dryer (or shut the gas valve on a gas model) before opening any panel, and never bypass or hard-wire around a thermal fuse to force heat.
Causes, most likely first
| Cause | How likely | The fix | Typical cost |
|---|---|---|---|
| Thermal fuse blown by a clogged vent | Most common | Clean the entire vent run from the lint screen to the exterior hood, then replace the blown one-time fuse. Skipping the vent just blows the new fuse again. | $10–30 part, $80–150 pro |
| Burned-out heating element (electric dryers) | Common | Test the coil for continuity and swap the element. A visibly broken or sagging coil is the giveaway. | $40–100 part, $150–300 installed |
| Failed cycling thermostat or high-limit thermostat | Common | A tech checks each thermostat with a meter and replaces the open one. Often bundled with the fuse repair. | $15–40 part |
| Weak or failed igniter or gas valve coils (gas dryers) | Occasional | The drum turns but the burner never lights. Replace the glow igniter or the valve coil set. | $40–150 part |
| Only one leg of the 240-volt circuit live | Occasional | The drum spins on 120 volts but heat needs the full 240. Reset both poles of the double-pole breaker firmly to off, then on. | Free |
Check these first
- Pull the lint screen and clean it, then go outside and confirm the vent hood flap opens with strong warm airflow while the dryer runs.
- For an electric dryer, check the panel: if one pole of the double-pole breaker tripped, the drum still turns but there is no heat.
- For a gas dryer, confirm the gas supply valve is open and other gas appliances are working.
- Feel the exhaust at the outside hood. Weak or cold air points at a clog or a heat fault, not the drum motor.
- Note whether the drum still tumbles. Tumbling with no heat isolates the problem to the heat circuit, not the motor.
Prevent it next time
Almost every no-heat call starts as a vent that nobody cleaned. Clear the full duct run at least once a year, more often for a large household, and the overheating that blows fuses and cooks thermostats never gets started. Our dryer maintenance checklist lays out the lint-screen, vent, and drum-seal tasks by season, and the cost of dryer vent neglect shows how a $0 cleaning prevents a $150 part swap and a real fire risk.
When to call a pro
Call a technician when a fresh vent cleaning does not restore heat, when you would need to test elements or thermostats with a meter, or for anything on a gas dryer past checking the supply valve. A diagnostic runs $80–150, an element or thermostat replacement $150–300, and a gas igniter or valve repair $150–350. Weigh those against the machine's age with our dryer lifespan guide: most dryers last 10–13 years, so a $250 heat repair on a 12-year-old unit is a coin flip.
Most of the causes above are maintenance problems wearing a disguise. OnOtto keeps the boring prevention on schedule so the 2 a.m. version doesn't happen.
Stop chasing symptoms, free for 30 daysFrequently asked questions
Why does my dryer run but not get hot?
The motor and the heat source are on separate circuits, so the drum can tumble while the heat is dead. On an electric dryer the usual culprit is a blown thermal fuse or a burned-out heating element, and sometimes just one leg of the 240-volt supply after a partial breaker trip. On a gas dryer a failed igniter or valve coil lets the drum spin with no flame. Start by cleaning the vent and checking both breaker poles before buying parts.
How much does it cost to fix a dryer that will not heat?
The cheapest and most common fix is a thermal fuse: the part is $10–30 and a pro visit runs $80–150. A heating element is $40–100 in parts or $150–300 installed, a cycling thermostat is $15–40, and a gas igniter or valve repair lands around $150–350. Because most dryers last 10–13 years, a single repair on a newer machine is worth it, but stacking a $300 fix onto a decade-old dryer often points toward replacement.
Can I finish drying a load with no heat?
You can tumble the clothes to knock out wrinkles, but no-heat air-drying a wet load indoors takes hours and can leave dampness that breeds mildew. It is better to wring the load, hang the heaviest items, and fix the heat first. Do not run the dryer for long stretches while you troubleshoot a possible vent clog, since the restriction that killed the heat is exactly what raises fire risk.
How do I know if it is the thermal fuse or the heating element?
A blown thermal fuse almost always comes with a story: the dryer overheated behind a clogged vent, then went cold all at once. A failing element more often fades, running cooler over weeks until loads stop drying. With the dryer unplugged, a meter tells you for certain: a good fuse and a good element each read continuity, and an open reading names the failed part. Clean the vent regardless, because a clog can take out either one.