Why is my dryer not heating? Causes and fixes
A dryer that runs but doesn’t heat is most often caused by a blown thermal fuse, a failed heating element on electric dryers, or a faulty igniter or gas valve coil on gas dryers. A clogged dryer vent is the underlying cause in most thermal-fuse failures and should be inspected first. Identify your dryer’s model number to order the correct replacement parts.
Need step-by-step instructions for your specific brand and model? Visit our DIY Repair Guide and filter by appliance and brand.
Safety information
For gas dryers, do not attempt repairs on the gas valve or burner assembly without shutting off the gas supply at the dryer’s shutoff valve. If you smell gas at any point, stop work, leave the area, and contact your gas utility. Heating element repairs on electric dryers require unplugging the dryer at the outlet — the breaker alone is not sufficient because dryers can hold residual charge in the control board capacitors.
Most common causes
- Blown thermal fuse — the most common single cause. Usually triggered by a clogged vent restricting airflow.
- Failed heating element (electric dryers) — the coil that produces heat burns out with age.
- Faulty igniter or gas valve coils (gas dryers) — the igniter glows but doesn’t light the burner.
- Defective high-limit thermostat — cuts power to the heat circuit when it senses overheating, often due to airflow restriction.
- Failed cycling thermostat or thermistor — the sensor that regulates temperature has failed.
- Faulty timer or electronic control board — less common, but possible if all heat-circuit components test good.
Step-by-step diagnosis
- Check the dryer vent and exhaust path. A clogged vent is the underlying cause of most thermal-fuse failures. Disconnect the dryer and inspect the vent for lint buildup before replacing any parts.
- Confirm power to the dryer. On electric dryers, check the breaker — dryers require both legs of 240V. A tripped breaker on one leg causes the motor to run but the heating element to stay cold.
- Test the thermal fuse for continuity with a multimeter. A failed thermal fuse shows no continuity and must be replaced. Always identify and fix the root cause (usually a vent issue) before replacing the fuse.
- On electric dryers, test the heating element for continuity. A failed element shows an open circuit and needs replacement.
- On gas dryers, observe the igniter at the start of the cycle. If the igniter glows but the burner doesn’t light, the gas valve coils are likely faulty. If the igniter doesn’t glow at all, the igniter itself has failed.
- Test the high-limit thermostat and cycling thermostat for continuity. Replace any that test open.
- If all heat-circuit components test good, the issue is likely in the timer or main control board.
Replacement parts to consider
Once the failed component is identified, enter your dryer’s model number on reliableparts.com to see the exact part for your specific dryer. Common parts for a no-heat condition: thermal fuse, heating element, igniter (gas), gas valve coils, high-limit thermostat, cycling thermostat.
Related FAQs
Where is the thermal fuse on a dryer?
On most dryers, the thermal fuse is on the blower housing or on the heat source itself — the heating element on an electric dryer or the burner assembly on a gas dryer. Access usually requires removing the back panel of the dryer.
How do I know if my dryer heating element is bad?
Test the heating element for continuity with a multimeter set to ohms. A working element shows continuity (a closed circuit, typically 10-50 ohms). A failed element shows an open circuit. Visually, a failed element often has a visibly broken or burned coil.
How long does a dryer heating element last?
Most dryer heating elements last 10 to 13 years under normal use. Clogged vents and poor airflow shorten that significantly by forcing the element to cycle more frequently.
Will my dryer still run if the heating element is broken?
Yes. The motor and drum are on a separate circuit from the heat. A dryer with a failed heating element will still tumble clothes but the air will be cold.
How much does it cost to replace a dryer heating element?
The part itself is typically $30-80 for most major brands. Professional installation adds $150-250 in labor. DIY replacement is straightforward for most dryers and takes 30-60 minutes.
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