Why is my dryer running but not heating at all?

The short version

Your dryer tumbles but the clothes come out cold and damp. The heat circuit is the problem, and it's separate from the motor.

On an electric dryer, check the breaker first. The motor runs on 120V and heat needs the full 240V, so a half-tripped double breaker spins the drum while killing the heat. This trips up more people than anything else.

If the breaker's fine, the usual suspects are a blown thermal fuse, a failed heating element, or (on gas models) a bad igniter. Most of these are cheap parts and a weekend-doable fix.

One rule before you start: if a safety fuse blew, the vent is probably clogged. Clear it, or you'll be doing this again next month.

What's actually going on inside

A dryer makes heat in one of two ways. Electric models run current through a coil that glows red. Gas models light a small burner. Everything else, the drum, the fan, the tumbling, is the same.

That split matters because it tells you where to look. If you've got a gas dryer, the heating element and 240V breaker don't apply. If you've got electric, the igniter and gas valve don't.

The safety chain is identical on both, though. A thermal fuse and one or two thermostats sit in the heat circuit. Any one of them failing open kills the heat entirely, even if the element or burner is perfect.

That's why 'no heat' has so many possible causes. The heat has to survive a whole series of switches, and a single break anywhere shuts it all down.

The good news: continuity testing marches right through that chain. You check each part in order and find the open one. No guessing, no throwing parts at it.

Working through it step by step

Start at the panel if you have an electric dryer. Find the double breaker, flip it fully off (you'll feel it snap past the tripped middle position), then back on. Run a test cycle.

No luck? Unplug the dryer or shut off the gas. Everything past this point happens with the machine dead.

Pull the vent hose off the back and look inside it and the wall duct. If it's packed with lint, that's likely your root cause and possibly your whole answer once a blown fuse gets replaced.

Now open the cabinet. On most dryers the back panel or lower front panel comes off with a handful of screws. Find the blower housing and the exhaust duct.

Test the thermal fuse first. It's a small white or black component with two wires. Set your meter to continuity, touch both terminals, and listen for the beep. No beep means it's blown.

For electric dryers, test the heating element next. Look for a visible break in the coil, then check continuity across the terminals. A good element reads a few ohms; a broken one reads open.

For gas dryers, put the panels back and watch the burner through the inspection port during a cycle. Glow but no flame points to the valve coils. No glow points to the igniter.

Test the thermostats last if the fuse and element check out. Same continuity test. At room temperature they should read closed.

• Multimeter set to continuity or ohms
• 1/4-inch and 5/16-inch nut drivers
• Phillips screwdriver
• Work gloves for sharp sheet metal
• A flashlight or headlamp

What it costs in 2026

This is one of the cheaper appliance repairs if you do it yourself. The parts are commodity items.

A thermal fuse runs $8 to $25. A cycling or high-limit thermostat is $10 to $30. An electric heating element lands between $30 and $70. A gas igniter is $25 to $60, and gas valve coils are $20 to $45.

Add a multimeter if you don't have one ($12 to $40) and you're still well under $100 for almost any DIY fix.

A professional repair runs $150 to $550. That's typically an $80 to $130 diagnostic fee plus parts and labor. The heating element and gas valve jobs sit at the higher end because of the labor to access them.

For context, a new dryer starts around $600 and a decent one is $800 to $1,200. Unless your machine is 15-plus years old and this is the third repair, fixing it wins on cost.

DIY or call someone

The breaker reset, vent cleaning, and thermal fuse swap are squarely DIY. If you can read a beep on a multimeter and turn a nut driver, you can handle those.

The electric heating element is doable for most confident DIYers, but it means working with 240V wiring. Unplug it, take a photo of the wiring before you disconnect anything, and match it exactly on reassembly.

Draw the line hard at gas. The igniter itself is a simple swap, but anything involving the gas valve body, the supply line, or a gas smell goes to a licensed tech. Full stop.

Call a pro too if you reset the breaker and it trips again, or if you replace a thermal fuse and it blows a second time without an obvious vent clog. Both point to a fault you want someone to trace properly.

And if the machine is stacked, wall-mounted, or a tight built-in, the labor to access parts can outweigh the DIY savings. Sometimes paying for the diagnostic is just smarter.

How long can you put this off

The no-heat symptom by itself won't burn your house down. You can safely leave a cold dryer alone for as long as you can live without dry laundry.

The cause is what decides urgency. If a clogged vent triggered a blown fuse, every extra load you force through packs more lint and raises the fire risk. That one you shouldn't sit on.

If it's a clean-cut element or igniter failure with a clear vent, there's no safety clock. Fix it when you can get the part.

Practically speaking, wet clothes turning sour in the drum is the real motivator. Mildew sets in within a day or two. Hang the current load and deal with the machine when you have time.

Why the vent is the real story

Here's the part most repair guides gloss over. Thermal fuses and thermostats don't fail randomly. They fail because the dryer got too hot, and it got too hot because the heat had nowhere to go.

A clogged vent traps heat inside the cabinet. The safety devices sense that spike and cut the circuit to protect the machine. They did exactly what they're built to do.

So when you find a blown fuse, treat it as a symptom. Clear the entire vent run: the flex hose behind the dryer, the rigid duct in the wall, and the exterior hood flap outside.

Check that the exterior flap actually opens when the dryer runs. Birds nest in them, flaps rust shut, and lint mats over the screen. A blocked termination undoes everything else you fixed.

Do this once a year and you'll dodge most no-heat calls entirely. It also drops your dry times and your energy bill, which is a nice bonus.

When these failures cluster

Gas igniters tend to give out on the first cold week of the season. The cold makes a marginal igniter work harder, and the weak one finally cracks.

Vent-related fuse blowouts spike during heavy laundry stretches. Holidays and back-to-school pile on loads, and a vent that was 80% clogged in October tips over into a full blockage.

Humid summer months slow drying and tempt people into running longer, hotter cycles. That extra thermal stress finds any weak thermostat.

None of this changes the fix. It just explains why your dryer picked the worst possible week to quit.

How we approach this diagnosis

We diagnose no-heat by walking the heat circuit in order of likelihood, cheapest and easiest first.

That means power at the breaker, then airflow at the vent, then the safety chain (thermal fuse and thermostats), then the heat source itself (element or igniter).

Continuity testing drives the whole thing. Each component either passes current or it doesn't, and the one that reads open is your culprit.

The cost ranges here reflect 2026 US pricing for common parts and typical service-call structures. Your exact numbers shift with brand, region, and how hard your specific model is to open up.

When a fix touches 240V wiring or any gas component, we point you to a licensed pro. Everything else, we'll walk you through.