Dryer Not Heating? 6 Common Causes and How to Fix Them

A dryer that tumbles but doesn't produce heat is one of the most common appliance problems we encounter at Appliance Pro Care. While it's frustrating to find damp clothes after a complete drying cycle, the good news is that many heating issues have straightforward solutions. Based on our experience servicing thousands of dryers throughout Greater Boston and the South Shore, here are the six most common causes of heating problems.

1. Clogged Dryer Vent

The most common cause of a dryer not heating is a clogged vent. When lint and debris build up in the vent system, airflow is restricted, causing the dryer to overheat and shut down its heating element.

Solution: Clean your dryer's lint trap after every load. Additionally, disconnect the dryer from the wall vent and clean both the vent in the wall and the duct on the back of the dryer. For thorough cleaning, consider hiring a professional dryer vent cleaning service annually.

2. Tripped Circuit Breaker or Blown Fuse

Electric dryers require two functioning circuit breakers or fuses—one for the motor and one for the heating element. If one trips or blows, the dryer will run but won't heat.

Solution: Check your home's electrical panel for tripped breakers. For dryers on a 240V circuit, both breakers need to be functioning. Reset any tripped breakers or replace blown fuses. If the problem recurs, it could indicate an electrical problem that requires professional attention.

3. Faulty Heating Element

The heating element in an electric dryer can burn out over time, especially if the dryer has overheated due to restricted airflow.

Solution: Testing and replacing a heating element typically requires professional service. Our technicians can quickly diagnose whether your heating element has failed and replace it if necessary.

4. Gas Supply Issues (Gas Dryers)

For gas dryers, problems with the gas supply, igniter, or gas valve solenoids can prevent proper heating.

Solution: First, verify that the gas supply to the dryer is turned on. If it is, issues with the igniter or gas valve solenoids require professional diagnosis and repair due to safety concerns with gas appliances.

5. Faulty Thermal Fuse

The thermal fuse is a safety device that prevents the dryer from overheating. Once it blows, the dryer won't heat until the fuse is replaced.

Solution: A blown thermal fuse must be replaced. However, it's crucial to identify and fix what caused it to blow in the first place—usually a clogged vent or duct. Our technicians can replace the fuse and address any underlying issues.

6. Defective Thermostat or Temperature Switch

Dryers have multiple thermostats and temperature switches that regulate heat. If one fails, it can prevent the dryer from heating properly.

Solution: Testing and replacing thermostats or temperature switches requires access to internal components and electrical testing equipment. Our professional technicians can diagnose which component has failed and replace it.

Preventive Maintenance Tips

To avoid heating problems with your dryer:

• Clean the lint trap after every load
• Have your dryer vent professionally cleaned annually
• Don't overload the dryer
• Ensure proper installation with correct venting
• Consider scheduling annual maintenance checks

By following these tips and addressing problems promptly, you can extend the life of your dryer and ensure it continues to heat properly for years to come.