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Dryer Not Heating? Electric and Gas Causes and Safe Fixes

Published 2026-10-19 · Last reviewed 2026-10-19 · Checked against manufacturer sources

Quick answer

Start with the free checks: a no-heat cycle such as Air Fluff, a tripped half of the 240-volt breaker on electric dryers, or a closed gas valve on gas models. If those are fine, look at the vent: a restricted vent is a common reason the thermal fuse blows. On a gas dryer, anything past the basic checks belongs to a technician.

Safety first: Unplug an electric dryer, or switch off its breaker, before moving it or touching the vent or panels. On a gas dryer, never touch the gas valve, connector or burner, and if you smell gas, leave the house and call the gas company from outside.

Run a five-minute heat test

Before anything else, confirm the problem. Whirlpool's test is a good one: run an empty dryer on a heated timed cycle for 5 minutes, then open the door and feel the air inside. Warm means the dryer heats and your real problem is slow drying, which has different causes (see our guide on a dryer that takes too long). Cold means keep reading.

Also check that nobody left it on Air Only or Air Fluff. Whirlpool says those cycles don't add heat at any point, so the drum turns and the clothes stay cool.

Electric dryers: check both halves of the breaker

An electric dryer needs 240 volts on its own 30-amp circuit, fused on both sides. In most homes that's a double breaker. Whirlpool explains that one side runs the motor and the other runs the heating element, so when only the heater side trips, the drum keeps turning and the clothes stay cold. A half-tripped double breaker can look like it's on at a glance.

At the panel, switch the dryer breaker fully off, wait a few seconds, then firmly back on. If your home has fuses, check both dryer fuses. LG dryers report this situation as nP (no power to the heater), Whirlpool electric models may show L2 or F4E4 for low line voltage, and Samsung may show 9C1.

If the breaker trips again, or the outlet or cord looks scorched, stop using the dryer and call a licensed electrician. If the dryer is new and has never heated, the power cord may not be installed correctly, so have the installer or an electrician check it.

Gas dryers: check the supply, from a safe distance

If you smell gas at any point (it's often described as rotten eggs), stop. Don't touch light switches, plugs or the dryer. Get everyone out and call the gas company or 911 from outside.

With no gas smell, there are two safe checks. First, see whether your stove or water heater works. If nothing gas-fired in the house works, the problem is the gas service and the utility needs to know. Second, look at the shutoff valve on the pipe behind the dryer without touching it. Whirlpool notes the valve is open when its handle runs parallel to the pipe. A closed valve or a kinked flexible connector is common after a move or a new install. LG gas dryers show gAS when they aren't getting gas, and Samsung lists HC2 as a gas ignition error.

Have the installer or a qualified gas appliance technician open the valve or fix the line. Don't adjust gas fittings yourself.

A blocked vent and a blown thermal fuse

This is the usual chain of events: lint builds up in the vent, the dryer runs hotter and hotter, and a one-time safety part called the thermal fuse blows to stop a fire. Depending on the model, the dryer then either won't run at all or tumbles with no heat until the fuse is replaced. RepairClinic points out that a blown fuse is often a sign of a restricted vent, and that's the part you need to fix.

Clean the lint screen, then unplug the dryer and check the duct behind it for crushing and lint. Check that the outside hood flap opens when the dryer runs. Whirlpool shows AF or F4E3, LG shows d80 (or d75 to d95), and GE shows Check Vent when airflow is poor. Samsung's hE often points to overheating from a clogged screen or vent.

Never bypass a thermal fuse or high-limit thermostat with a jumper wire. On an electric dryer, a handy homeowner can replace the fuse with the dryer unplugged, but only after the vent has been cleaned, or the new fuse is likely to blow too. iFixit also points out that a stuck high-limit thermostat can blow the fuse, so it's often replaced at the same time.

Electric dryer parts that fail

Past the fuse, the usual suspects on an electric dryer are the heating element (a coil of wire that can break), the high-limit thermostat, the cycling thermostat, and the temperature sensors (thermistors) on newer electronic models. Whirlpool links F4E1 to the heater or its relays, and Sears PartsDirect lists F4E2 as a heater relay failure.

These parts get checked for continuity with a meter, always with the dryer unplugged, and usually with the back panel or the front off. If you're comfortable with that and have the full model number, the parts are inexpensive. If you're not, a technician can test them in one visit.

Gas dryer parts that fail (technician territory)

Gas dryers light a burner instead of heating a coil. A hot-surface igniter glows, the gas valve coils open the valve, and a flame sensor confirms the burner lit. iFixit describes how a technician tells them apart. No glow at all points to the igniter or the thermal fuse. An igniter that glows for a long time (around five minutes) with no flame points to the flame sensor. One that glows for up to two minutes, goes out and never lights the gas points to the gas valve coils.

That's useful to know so you can describe the symptom when you book a repair. If your dryer has a viewing hole near the burner and you can watch the igniter without taking anything apart, note what it does. Don't remove panels near the burner or touch the gas valve. Everything on the gas side of the dryer is a job for a qualified gas technician.

Motor and controls

One less obvious cause applies to both types. Many motors have a centrifugal switch that tells the heat circuit the drum is up to speed. RepairClinic notes that when that switch fails, the motor can run normally while heat never comes on, and since the switch is rarely sold alone, the whole motor gets replaced. A technician will usually check this after the heat parts test fine.

When to call a professional

Any gas dryer that still won't heat after the supply checks needs a technician. If an electric dryer's breaker trips again or the outlet looks burned, call a licensed electrician before using it. Also book a repair if a new thermal fuse blows soon after replacement, since something is still overheating.

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