Dryer Not Heating? Here's What to Check First

When your dryer tumbles clothes but they come out damp and cold, the problem is almost always a failed heating component — not the motor or drum. The specific cause depends on whether you have a gas or electric dryer, but both types share some common failure points.

Before calling for repair, there are a few things you can check yourself that might solve the problem without a service call.

Lint filter and exhaust vent: A clogged lint filter or blocked dryer vent is the #1 cause of poor drying performance. Remove the lint screen and clean it thoroughly. Then check the exhaust vent outside your home — if air flow is weak when the dryer runs, the vent duct may be clogged. Restricted airflow causes the dryer to overheat and trip safety devices that shut off the heat.

Circuit breaker (electric dryers): Electric dryers use a double-pole 240V breaker. If one half trips, the dryer motor runs (120V) but the heating element doesn't get power (240V). Check your breaker panel — flip the dryer breaker fully off, then back on.

Gas supply (gas dryers): Make sure the gas valve behind the dryer is fully open. If you recently had gas work done or moved the dryer, the valve may have been partially closed.

Blown thermal fuse: The thermal fuse is a safety device that cuts power to the heating element if the dryer overheats. Once blown, it doesn't reset — it must be replaced. A blown thermal fuse is the most common cause of an electric dryer not heating and is typically caused by a clogged vent.

Failed heating element: The heating element is a coil of resistance wire that glows red-hot when electricity flows through it. Over time, the coil can break or burn out. Replacement is a straightforward repair for a technician.

Faulty cycling thermostat: The cycling thermostat regulates the dryer temperature by turning the heating element on and off. If it fails in the open position, the element never turns on.

Faulty igniter: Gas dryers use a glow-bar igniter that heats up to open the gas valve and ignite the burner. If the igniter cracks or weakens, it can glow without getting hot enough to open the gas valve. You'll hear the dryer attempt to ignite (a brief humming sound) then give up.

Worn gas valve solenoids: These electromagnetic valves open to allow gas flow to the burner. They can fail intermittently — the dryer heats for a while, then stops mid-cycle. This is a telltale sign of solenoid failure.

Flame sensor failure: The flame sensor detects whether the igniter is hot enough before opening the gas valve. If it fails, the valve never opens, even with a working igniter.

A simple test: disconnect the dryer exhaust vent from the back of the dryer and run a short cycle. If the dryer heats normally with the vent disconnected, the vent duct is restricted and needs cleaning. If the dryer still doesn't heat, a component has failed and you need professional repair.

Never run the dryer for extended periods with the vent disconnected — it fills your laundry room with hot, humid air (and combustion gases for gas dryers).

Can a clogged dryer vent cause a fire?
Yes. The U.S. Fire Administration reports that clogged dryer vents cause approximately 2,900 home fires each year. Annual vent cleaning is strongly recommended.

How much does dryer heating repair cost?
Thermal fuse and thermostat replacements are among the most affordable appliance repairs. Heating element replacement is moderate. Gas valve solenoid replacement is also very reasonable. Our diagnostic fee is waived when you approve the repair.

Should I repair a dryer that's 10+ years old?
Dryers are mechanically simpler than most appliances and can last 15–20 years. If the drum, motor, and cabinet are in good shape, replacing a heating component is almost always worth it, even on an older dryer.