How to Fix a Dryer That Won't Heat Up

A dryer that runs but produces no heat is one of the most frustrating appliance problems. Your clothes come out just as wet as when they went in. The good news is that most heating issues have simple causes you can diagnose and sometimes fix yourself before calling a technician.

Step 1: Check the Lint Filter and Vent

A blocked lint filter or clogged exhaust vent is the most common cause of a dryer not heating properly. When airflow is restricted, the dryer's thermal protection switches off the heat to prevent fire.

• Clean the lint filter before or after every use.
• Disconnect the dryer from the wall and check the exhaust hose at the back. Clear any blockage.
• Check the external vent flap on the wall or roof where the duct exits the building. It should open and close freely.

After clearing blockages, run the dryer again and check if heat returns.

Step 2: Check the Power Supply

Electric dryers require a double-pole 240-volt circuit. If one phase of that circuit has tripped, the drum may still spin but the heating element will not work.

• Check your switchboard for a tripped circuit breaker.
• Reset any tripped breakers and test the dryer again.

Step 3: Check the Thermal Fuse (Electric Dryers)

Electric dryers have a thermal fuse — a one-time safety device that blows if the dryer overheats. Once blown, it cannot be reset. It must be replaced. Symptoms of a blown thermal fuse:

• The drum spins but there is no heat.
• The dryer runs but clothing is not drying.

A technician can test this with a multimeter and replace the fuse if faulty. It is an inexpensive repair.

Step 4: Check the Heating Element (Electric Dryers)

If the thermal fuse is intact, the heating element may have burned out. This is a more involved repair but still common. Signs of a failed heating element include the drum running normally but completely cold air. This repair is usually worth doing on machines less than five to seven years old.

Step 5: Check the Gas Supply (Gas Dryers)

If you have a gas dryer:

• Check that the gas supply valve behind the dryer is open.
• Check that your gas is on at the meter.
• If other gas appliances are working, the dryer's igniter or gas valve solenoids may have failed and need a technician.

When to Repair vs Replace

If your dryer is more than 10 years old and needs an expensive repair, it may be more economical to replace it. Modern dryers are significantly more energy-efficient than older models, so the savings on running costs can help offset the purchase price.

Oceania Appliances stocks a wide range of dryers across all types and budgets in Sydney, with free delivery to your door. If your old dryer has reached the end of its life, we can help you find a great replacement at a fair price.