Dryer Not Heating: The Full Checklist, by Fuel Type

Last updated: October 2026 · DryVerdict

A dryer that tumbles but won't heat is not one problem — it's two different machines sharing a symptom. An electric dryer makes heat with a 240V element; a gas dryer makes it with a burner, an igniter, and a set of solenoid coils. The checks, the test values, and the safety lines are all different, so the first step is knowing which one you own: a thick 240V plug and no gas line means electric; a normal plug plus a flexible gas line means gas.

Work your fuel's list in order. The order is the value here — it's arranged so the free and most-common causes come before the parts people usually buy first and regret.

Before either list: two checks that cost nothing

1. The cycle. Air Fluff / Air Dry adds no heat by design. Confirm you're on a heated cycle before diagnosing anything.
2. The airflow. A dryer choked by a clogged vent overheats, cycles its heat off early, and blows safety fuses. Clean the lint screen, check the outside hood opens fully, and look at the duct behind the dryer for crushing or kinks. If drying is also slow, start with our guide to a dryer that takes too long to dry.

Electric dryer, no heat: the test order

1. The breaker — the lost leg of 240V

Your motor and controls run on 120V; the element needs the full 240V. Lose one leg — commonly a half-tripped double-pole breaker — and you get a dryer that tumbles perfectly and heats not at all. Flip the breaker fully off, then on, and retest. That free step is the whole story of our electric dryer no heat but runs guide. Do not verify voltage at the outlet or terminal block yourself; live 240V testing is not a DIY step.

2. Thermal fuse

Unplugged, wires off, test for continuity. Continuity (near 0 ohms) is good; OL means blown. A blown fuse is a symptom — it died because the dryer overheated, usually from restricted airflow — so fix the cause along with the fuse. If yours keeps blowing, that's a separate diagnosis.

3. Heating element

Resistance across the terminals, unplugged: roughly 10–30 ohms is the healthy general band, and many common elements read around 10–15 ohms. OL is a broken coil; also test each terminal to the metal case — any reading there means a grounded element, which can heat weakly or erratically and must be replaced.

4. Hi-limit thermostat, then cycling thermostat

At room temperature both should show continuity (the hi-limit reads under 1 ohm). An open hi-limit kills heat; a tired cycling thermostat can cut heat early. Past these sit the timer and control board — the point where most people are better served by a tech.

Gas dryer, no heat: the test order

Gas has its own guide — gas dryer no heat — because the pattern matters as much as the parts: never heats at all points at the igniter circuit (thermal fuse, thermostats, flame sensor, igniter, in that order), while starts hot, then goes cold after about 10 minutes is the signature of the gas valve coils failing as they warm up. Know which pattern you have before you buy anything.

What it costs, honestly

Parts, if you test first and buy once: thermal fuse $5–15, heating element $30–80, igniter $20–60, valve coil set $20–60, flame sensor $15–40. Professional totals commonly run $150–350 for an electric element job and $130–280 for gas ignition parts. The expensive mistake isn't the repair — it's replacing parts in the wrong order without a meter.