Dryer Not Heating

Why Your Dryer Is Not Heating

If your dryer runs but produces no heat, the most common causes are a blocked exhaust vent, a blown thermal fuse, or a failed heating element on electric models — and a weak igniter or failed valve coils on gas dryers. Check the vent first: a restricted duct is the root cause of most thermal fuse failures.

A dryer that tumbles but doesn't heat is one of the most common appliance complaints. Long or shared vent systems can contribute to heating issues, but the good news is that the cause is usually identifiable and repairable.

Check the Exhaust Vent First

A blocked exhaust vent is the #1 cause of dryer heating failures — and it's a fire hazard.

Extended duct runs and shared vent paths can restrict airflow over time.

How to check:

• Pull the dryer away from the wall and inspect the duct hose for kinks or crushing
• Check the exterior vent cap — pull out lint and verify the flap opens freely
• Clean the full vent duct path (ideally once a year)

A restricted vent causes the dryer to overheat and trip the thermal fuse — which then cuts off heat completely. If the thermal fuse is gone, the vent must be cleared before replacing it, or the fuse will blow again.

Electric Dryer: Most Common Causes

1. Blown Thermal Fuse

The thermal fuse is a one-time-use safety device. When it blows (usually due to overheating from a blocked vent), it cuts off heat permanently until replaced.

Signs:

• Dryer runs and tumbles, produces zero heat
• No heat on any setting

The thermal fuse cannot be reset — it must be replaced. Clear the vent first.

2. Failed Heating Element

The heating element is the coil that generates heat. Over time it can burn out.

Signs:

• Dryer runs and tumbles, no heat
• Thermal fuse is intact (tested with a multimeter)
• Visual inspection shows a broken coil

Heating element replacement requires a technician.

3. Cycling Thermostat Failure

The cycling thermostat regulates operating temperature. When it fails, the dryer may produce no heat or may overheat.

Signs:

• Inconsistent heat — sometimes works, sometimes doesn't
• Dryer overheats and shuts off mid-cycle

4. Blown Household Circuit Breaker

Electric dryers run on 240V and use two circuit breakers. If one leg trips, the dryer may tumble but produce no heat.

How to check:

• Go to your electrical panel
• Look for the dryer breaker — reset it if tripped (flip fully off, then on)
• If it keeps tripping, have an electrician inspect the circuit

Gas Dryer: Most Common Causes

1. Failed Igniter

The igniter lights the gas burner. When it fails, the burner never lights and there's no heat.

Signs:

• Dryer runs, you can smell a brief gas puff, then nothing
• No heat on any setting
• The igniter glows but burner doesn't light (indicates gas valve issue instead)

Igniter replacement requires a technician.

2. Gas Valve Solenoid Failure

The gas valve solenoids open to allow gas to flow to the burner. When one fails, the burner won't stay lit.

Signs:

• Burner lights briefly then shuts off
• Clothes take multiple cycles to dry
• Igniter glows but flame doesn't hold

3. Gas Supply Issue

Verify your gas supply before calling for repair:

• Is the gas shut-off valve behind the dryer fully open?
• Are other gas appliances in the home working normally?
• Has your gas service been recently shut off for any reason?

Troubleshooting Steps

1. Clean the exhaust vent and check for blockages
2. Check the household circuit breaker (electric dryers)
3. Verify gas supply is on and other appliances work (gas dryers)
4. If dryer tumbles with no heat → suspect thermal fuse (electric) or igniter (gas). If the drum is not rotating at all, see our dryer not spinning guide.
5. If dryer used to take multiple cycles and now doesn't heat → vent blockage triggered fuse failure
6. If dryer overheats and shuts off → cycling thermostat or vent restriction
7. For any gas component issues → call a technician for safety