You toss a load of wet laundry in the dryer, come back an hour later, and everything is still damp. The drum is spinning—but there’s no heat. What’s going on?

A dryer that won’t heat is one of the most common appliance complaints we see. The good news: most causes are diagnosable and fixable. Here are the 5 most likely culprits.

1. Clogged Dryer Vent

This is the #1 cause—and the most overlooked. When your exhaust vent is packed with lint, the dryer can’t expel hot air properly. As a safety measure, it shuts off the heat to prevent a fire. Check your exterior vent flap: if there’s little to no airflow when the dryer runs, you’ve likely found your problem.

Can you fix it yourself? Yes—disconnect the vent hose and clean it out thoroughly. Consider a professional vent cleaning if the duct runs a long distance through the wall.

2. Burned-Out Heating Element (Electric Dryers)

Electric dryers use a coiled heating element to generate heat. Over time, the coil can break—and when it does, you get a spinning drum with zero heat. This is the most common cause on electric dryers after vent issues.

Can you fix it yourself? Possible with a multimeter and some comfort with appliance disassembly. Most homeowners call a tech for this one.

3. Blown Thermal Fuse

The thermal fuse is a one-time safety device that blows if the dryer overheats. Once blown, it permanently cuts off heat until replaced. The catch: a blown thermal fuse is usually caused by a clogged vent. If you replace the fuse without clearing the vent, it’ll blow again quickly.

Can you fix it yourself? The fuse itself costs $5–$15 and replacement is straightforward. Just make sure to address the vent at the same time.

4. Failed Gas Igniter (Gas Dryers)

On gas dryers, the igniter lights the burner to create heat. If the igniter fails, gas won’t ignite and you’ll get a cold drum. You can sometimes confirm this by watching the burner area during a cycle—you should see a brief glow followed by a flame. No glow means a likely bad igniter.

Can you fix it yourself? Igniters are fragile and gas lines are involved—we recommend calling a tech for this repair.

5. Cycling Thermostat Failure

The cycling thermostat regulates drum temperature during operation. When it fails, the dryer may produce no heat or inconsistent heat. It’s less common than the other causes but worth checking if everything else tests fine.

Can you fix it yourself? Testable with a multimeter. Replacement is moderate DIY difficulty.

When to Call a Professional

If you’ve checked the vent and the problem persists, it’s time for a professional diagnosis. Appliance Intervention services dryers throughout Mechanicsburg, PA and the surrounding area—both electric and gas models.

Call (717) 210-2930 to book a same-day or next-day appointment.

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