Why Is My Dryer Not Heating? Gas & Electric Causes

A dryer that tumbles but won't heat is one of two problems: an electrical heat-source failure (electric dryers) or an ignition failure (gas dryers). The third possibility — and the one homeowners almost always overlook — is a clogged vent that's tripping the safety thermostat over and over.

Here's how to figure out which one you have.

First: is it a gas or electric dryer?

Look at the cord. A gas dryer has a normal 3-prong household plug AND a yellow gas line behind it. An electric dryer has a thick 4-prong (or older 3-prong) 240V cord and no gas line. The diagnosis path is different for each.

Electric dryers

1. Heating element

This is the #1 failure. The heating element is a coiled wire inside a metal housing — when it burns through, the dryer runs but produces zero heat. You can ohm-test it with a multimeter (should read 10-30 ohms). Open circuit = bad element.

Common on Whirlpool, Maytag, and Kenmore electric dryers around the 8-10 year mark.

2. Thermal fuse

A one-shot safety device that pops when the dryer overheats. When it pops, the dryer either won't heat or won't run at all (depends on the model). The thermal fuse pops because of restricted airflow — so if you replace it without cleaning the vent, it'll pop again within a week.

3. High-limit thermostat

Resets itself but trips repeatedly when airflow is restricted. Same root cause as the thermal fuse.

Gas dryers

4. Igniter

The igniter glows orange to light the gas burner. When it cracks (very common, usually a $40 part), gas flows past it but never lights, so you get no heat. You'll often see the igniter glow once at the start of the cycle and never again — that's a different fault (usually a flame sensor).

5. Gas valve coils

A pair of solenoid coils that open the gas valve once the igniter is hot. When one fails, the igniter glows but gas never flows. Replace as a pair.

6. Flame sensor

Senses heat from the igniter and tells the gas valve to open. When dirty or failed, the igniter glows but never gets the signal to release gas.

The hidden cause: vent restriction

About a third of "dryer not heating" calls in Minneapolis and Saint Paul turn out to be vent issues. Long vent runs through a finished basement, lint buildup, or a crushed flex hose behind the dryer all restrict airflow. The dryer overheats, pops the thermal fuse, and homeowners replace the fuse — only for it to pop again two weeks later.

Disconnect the vent at the back of the dryer and run it on Air Fluff. If clothes start drying normally, your vent is the problem, not the dryer.

What to check before you call

• Pull the lint trap out and shine a flashlight down — if you can see lint walls, vacuum it out
• Disconnect and inspect the vent hose for crushing or lint clogs
• Check the breaker panel: an electric dryer with one tripped leg of the 240V breaker will tumble (120V works) but not heat (240V is dead)
• Try a small load on a higher-heat setting

When to call a tech

Heating-element replacement, gas-valve diagnosis, and vent cleaning past the wall are all jobs we'd rather do than have you do. Gas work in particular: don't guess.

We service dryer repair across Minneapolis, Saint Paul, and the western metro, usually same-day.

Book a dryer repair and tell us if it's gas or electric — we'll bring the right parts.