Why Your Dryer Isn't Heating

A tumble dryer that spins normally but leaves your clothes cold and damp has suffered a failure in its heating circuit. This is rarely a random breakdown; it is usually a protective safety measure triggered by poor airflow within the machine.

The Link Between Airflow and Heating

Dryers rely on a constant flow of air to carry heat away from the element and through the wet clothes. If the lint filter is blocked, the air cannot flow. The heating element rapidly overheats, and a safety thermostat (thermal cutout) trips to cut the power and prevent a fire. The drum will keep spinning, but the air will remain cold.

Common causes

  • Tripped safety thermostat (thermal overload cutout)
  • Burnt-out heating element assembly
  • Severely blocked lint filter or condenser unit restricting airflow
  • Faulty heater relay on the main control board
  • Compressor failure (on Heat Pump models only)

Safe first checks

  1. [object Object]
  2. [object Object]
  3. [object Object]
  4. [object Object]

Safety warning

Tumble dryers draw high electrical currents. Always unplug the appliance before attempting to inspect the rear heating element cover or reset buttons.

When to stop and call a professional

If the filters are clean and there is no external reset button, the heating element or internal thermostats have likely failed. An engineer is required to test the circuit with a multimeter and replace the parts.

How this information is researched

Publisher: Error Code Lookup Editorial Team. Error Code Lookup is an independent appliance-information resource and is not affiliated with appliance manufacturers. Guidance is written in our own words and reviewed with safety boundaries in mind.

Editorial policy & source methodology · About Error Code Lookup · Report a correction

Frequently asked questions

Why did the safety thermostat trip?

Thermostats trip when the heater gets dangerously hot. This is almost always caused by poor airflow due to a blocked lint filter, a blocked condenser, or a crushed vent hose.

Is it worth replacing the heater?

Yes, heating elements and thermostats are standard consumable parts and are generally cost-effective to replace compared to buying a new dryer.

Why does my heat pump dryer take so long?

Heat pump dryers use a compressor instead of a traditional heating element. They dry at much lower temperatures (around 50°C) to save energy, meaning cycles naturally take twice as long.