Dryer Not Heating: What Fails and What to Check
A dryer that tumbles but does not heat is usually starved of airflow, not broken. A blocked lint filter or vent duct traps heat inside the cabinet, the safety thermal fuse cuts the heat to protect the machine, and the drum keeps spinning cold. That is the first thing to check on both electric and gas models. After airflow, the causes split by fuel: an electric dryer loses its heating element, thermal fuse or one leg of the 240 volt supply, while a gas dryer loses the igniter, the flame sensor or the gas valve coils.
What causes it
| Cause | What you see | Who fixes it |
|---|---|---|
| Clogged lint filter or vent duct | Long cycles, hot cabinet, damp clothes, lint behind the drum | You can clear it |
| Blown thermal fuse (both types) | No heat at all right after a long overheated run | Technician |
| Failed heating element (electric) | Drum turns, air stays cold, no burning smell | Technician |
| Lost one leg of 240 volts (electric) | Dryer runs but never heats, breaker looks fine | Technician or electrician |
| Igniter or flame sensor (gas) | You hear the click, no flame, or flame lights then dies | Technician |
| Gas valve coils (gas) | Igniter glows, gas never opens, cycle ends cold | Technician |
Two places block: the filter first, the duct next.
What you can check yourself
- Pull the lint filter and clean it, then hold it under running water. If the water pools instead of running through, softener residue is sealing the mesh.
- Look at the vent hood outside while the dryer runs. Weak or no airflow means the duct is packed.
- Disconnect the duct at the back and run the dryer for a minute. If it heats with the duct off, the duct is the problem, not the dryer.
- Check the breaker on an electric dryer. Both halves of the double breaker must be on. A half-tripped breaker still turns the drum.
- On a gas dryer, listen at the start of the cycle. A click with no whoosh points at the igniter or the coils.
- Feel the cabinet after ten minutes. Hot outside with cold air inside means heat is trapped and the vent is blocked.
Where to stop
Stop once the filter and the duct are clear and the dryer still runs cold. Everything left is behind the panel: line voltage, a gas valve or a fuse that blew for a reason worth finding. Replacing a thermal fuse without clearing what overheated the machine only blows the next fuse, and a packed lint duct is the single most common cause of laundry fires.
Call C&C Appliance Repair at (800) 860-0974 for same-day service across Los Angeles and Orange County.
After airflow, the causes split by fuel.
Why the duct gets cleared before the repair is signed off.
Questions we get asked
The dryer tumbles fine, so why is it not heating?
Tumbling and heating are separate circuits. The motor can run perfectly while the heat is cut by a blown fuse, a dead element or a gas valve that never opens.
How often should the vent be cleaned?
Once a year for most households, twice if you dry bedding and towels for a family or the duct run is long. A long run through the attic in an older Los Angeles house collects lint fast.
Is a dryer that will not heat dangerous?
The heat problem itself is not, but the usual cause is. Lint packed in the duct is what turns a slow dryer into a fire. That is why we clear the duct before we sign off the repair.
Can I replace the thermal fuse myself?
The part is cheap and the swap looks simple, but the fuse blew for a reason. Without finding the restriction that overheated the machine you get another dead dryer in a few weeks.
Which brands do you work on?
All of them, including LG, Samsung, Whirlpool, Maytag, KitchenAid, Bosch, Miele, Speed Queen, Electrolux and Asko, gas and electric alike.
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