Dryer Not Heating? 7 Causes, Fixes and Thermal Fuse Facts
Why the vent matters: the U.S. Fire Administration estimates about 2,900 clothes dryer fires in homes each year, and “Failure to clean (34 percent) was the leading factor contributing to the ignition” of them.
Dryer not heating: match what you see
| What you notice | Most likely cause | Next step |
|---|---|---|
| Drum turns, air is cold from the start | No-heat setting, one breaker tripped (electric), gas valve closed (gas) | Settings, breakers, gas valve |
| Some heat, but clothes take two or more cycles | Clogged lint screen or vent, crushed duct, overloading | Lint and vent |
| Heat at first, then cold; outside of the dryer very hot | Restricted vent tripping the cycling or high-limit thermostat | Clean the vent |
| Samsung shows hE or HC, or the Vent Check light | Dryer overheating from a blocked vent | Lint and vent |
| Dryer won’t start at all, or runs with no heat after an overheating episode | Blown thermal fuse (depends on model) | Thermal fuse |
| Gas dryer: you can see the igniter glow but no flame, or no glow at all | Gas valve coils or igniter | Technician or careful repair |
1. Check the cycle setting
Whirlpool: “The Air Only cycle or Air/Fluff Only does not add heat to the dryer at any time during the cycle.” Some energy-saving settings delay heat too; Samsung notes that “Some settings, like Eco Dry, will cause portions of the cycle (like the beginning) to operate without heat.” Pick a timed dry with a normal heat level for testing.
2. Do a 30-second heat test
Samsung’s quick test works on any brand: set a timed dry with heat (Eco Dry off on Samsung models), start it, and “After 30 seconds, open the door and feel inside.” Any warmth means the dryer heats and the problem is slow drying (go to lint and vent). Cold air means no heat at all (keep going).
3. Electric dryers: check both breakers
An electric dryer needs 240 volts. Whirlpool: “Electric dryers require a separate 30-amp circuit fused on both sides of the line,” and you should “Check that both circuit breakers operating the dryer are not tripped.” The drum motor runs on one side of the circuit and the heating element needs both, so a single tripped breaker or blown fuse gives you a dryer that tumbles with cold air. Samsung’s reset: “Turn the circuit breaker off, wait 30 seconds, and then turn it back on.” If the breaker keeps tripping, call an electrician.
4. Gas dryers: check the gas supply
Make sure the gas shutoff valve on the supply line behind the dryer is open. Whirlpool: “The valve is open when the handle is parallel to the gas pipe.” Samsung adds that the gas line connection should be “installed properly and turned on.” If other gas appliances in the house aren’t working either, call your gas utility.
⚠️ Gas dryer: stop if you smell gas
If you smell gas, don’t run the dryer or use light switches or phones inside. Leave the home and call your gas utility or 911 from outside. Before checking the igniter or valve coils, unplug the dryer and close its gas shutoff valve. Gas lines, connectors and the gas valve body should be serviced only by a qualified technician.
5. Clean the lint screen and the whole vent
A clogged vent is the most common reason for weak heat, long drying times and heat error codes, and it’s also the fire risk. The heat has nowhere to go, so the dryer’s thermostats switch the heater off, and if it gets hot enough the thermal fuse blows.
- Lint screen: CPSC: “Clean the lint screen/filter before or after drying each load of clothes.”
- Duct behind the dryer: look for a crushed, kinked or sagging duct. CPSC says to “Replace plastic or foil, accordion-type ducting material with rigid or corrugated semi-rigid metal duct.”
- Whole vent run to the outside: Samsung says to “Clean your exhaust vent once or twice each year whether you experience issues or not,” and notes that “Every 90 degree turn reduces the maximum length by 6 feet.” Check the outside hood flap opens freely when the dryer runs.
- Samsung dryers: the Vent Check icon “will light up if the exhaust vent is about 60% clogged,” and blinks at 80%. Codes hE and HC mean “the dryer is getting too hot,” and Samsung says “The most common cause is a clogged lint screen or vent system.” Samsung’s vent blockage test (in your manual) confirms it.
Long, rooftop or hard-to-reach vents are worth a professional vent cleaning; CPSC also recommends having “a qualified service person clean the interior of the dryer chassis periodically.”
⚠️ Caution: disconnect power first
Unplug the dryer before you remove any panel or test a part. Electric dryers run on 240 volts, so if yours is hardwired, switch off its double breaker. On a gas dryer, also close the gas shutoff valve. Never bypass a thermal fuse or thermostat, even briefly. If you aren’t comfortable working inside the dryer, call a qualified appliance technician.
6. The thermal fuse: what a blown one means
The thermal fuse is a one-time safety cutoff on the exhaust duct or blower housing. Whirlpool explains: “Dryers are mandated to carry a thermal fuse to prevent fires. These fuses are a one-time device: when the temperatures within the dryer get too high, they will go off, shutting down the dryer. If your thermal fuse has activated, you must replace it before using the dryer.”
- It can’t be reset, and it should never be jumped with a wire or bypassed, even “just to test.” A blown fuse means the dryer already overheated, and the fuse is what stops that turning into a fire.
- Find the cause first. In most cases it’s the vent. Replacing the fuse without clearing the vent means the new one blows too.
- Symptoms vary by model: on some dryers a blown fuse stops the dryer starting; on others the drum runs but there’s no heat.
- Testing and replacing it means taking the back or front panel off. A technician confirms it with a continuity test on the unplugged dryer. Whirlpool recommends a professional, because the job requires disassembly.
7. Heating element, igniter, valve coils and thermostats
If the settings, power, gas and vent are all fine and the fuse is good, one of these has failed:
- Heating element (electric): a coil that can burn through, often after running with a restricted vent.
- Igniter and gas valve coils (gas): the igniter glows to light the burner, and the coils open the valve. An igniter that glows but never lights the gas often points to the coils.
- Cycling and high-limit thermostats: they switch the heat on and off to hold temperature and cut it if the dryer gets too hot.
These parts sit inside the cabinet next to wiring, and on gas models next to the burner. Many owners replace them with the dryer unplugged (and the gas valve closed), but if you’re not comfortable working inside the dryer, call a technician. Manufacturers such as Maytag tell owners not to service parts unless the manual specifically recommends it.
What dryer heat repairs usually cost
| Repair | Typical cost | Source |
|---|---|---|
| Fixing a dryer that’s not heating | $80 to $420 | Angi (Sept 2026) |
| Service call | $50 to $80 plus labor (Angi); $70 to $130 minimum (HomeGuide) | Angi; HomeGuide |
| Thermal fuse | $75 to $150 installed; part alone $5 to $18 | HomeGuide (Nov 2024); Angi |
| Heating element | $150 to $350 installed | HomeGuide |
| Igniter | $100 to $250 | HomeGuide |
| Thermostat | $100 to $300 | HomeGuide |
HomeGuide’s rule of thumb: a repair is usually worth it if the dryer is under 4 to 6 years old and the fix is minor, or if it costs less than half a new dryer.
When to call a technician
Call for service if the breakers, gas valve and vent all check out and there’s still no heat, if the thermal fuse has blown more than once, if a breaker keeps tripping, or if you smell burning. Have the model and serial number (usually inside the door) and what you’ve tried. Print the checklist.
Frequently asked questions
Why is my dryer running but not heating?
Most often a no-heat setting, one tripped breaker on an electric dryer, a closed gas valve on a gas dryer, or a blocked vent. After those, the thermal fuse, heating element, igniter, valve coils or a thermostat has usually failed.
Will a dryer run without a thermal fuse?
It depends on the model: some won’t start when the fuse blows, others tumble without heat. Either way, Whirlpool says the fuse must be replaced before you use the dryer. Never jump it.
How do I know if my dryer thermal fuse is blown?
A dryer that won’t start or runs with no heat, often after a long cycle with a blocked vent, is the clue. Only a continuity test on the unplugged dryer confirms it.
Can I jump the thermal fuse to test it?
No. Jumping it removes the dryer’s overheat protection, and a blown fuse means the dryer already overheated. Test it unplugged or have a technician do it, and clean the vent first.
How do I reset my dryer heating element?
You can’t. Heating elements and thermal fuses don’t reset. Turning the breaker off for 30 seconds only resets the controls.
How much does it cost to replace a thermal fuse?
About $75 to $150 installed (HomeGuide); the part alone is $5 to $18 (Angi).
Is it worth fixing a dryer that doesn’t heat?
Usually, if it’s under about 6 years old and the repair is a fuse, element or igniter. HomeGuide suggests replacing it if the repair costs more than half a new dryer.
Sources: Whirlpool: dryer not heating · Whirlpool: electric dryer not heating · Whirlpool: gas dryer not heating · Samsung: dryer not heating · Samsung: dryer error codes · Samsung: Vent Check icon · Maytag gas dryer use and care guide · CPSC: overheated clothes dryers · U.S. Fire Administration: clothes dryer fires · Angi: dryer repair cost · HomeGuide: dryer repair cost.
Updated October 22, 2026. Written and edited by Jordan Hale. Steps checked against Whirlpool, Samsung, Maytag, CPSC and U.S. Fire Administration guidance; no hands-on test is claimed. Follow your owner’s manual for your model.
