Home › Appliances › Tumble Dryer Not Heating

TUMBLE DRYER FAULTS

Tumble Dryer Not Heating

A tumble dryer that runs without heat usually has blocked airflow, a tripped thermal cut-out, failed heater, thermostat fault or damaged wiring.

!

Switch off and unplug before cleaning inside, removing panels or checking moving parts

Tumble dryers combine mains electricity, high heat, lint and rotating components. Stop using the appliance if it overheats, trips the electrics, smells burnt or makes grinding noises.

MOST LIKELY CAUSES

Start with these

Blocked airflow Lint in filters, vents or condenser channels can stop safe heating.
Thermal cut-out open Overheating may trigger a safety device.
Heater failure The element may be open-circuit or damaged.
Thermostat or sensor fault The dryer may receive an incorrect temperature signal.
◫ Symptom variations Match the exact point in the drying cycle. ⌄
  • Drum turns but air stays cold
  • Dryer stops early
  • Clothes remain damp
  • Heat returns briefly after cooling
  • Burning smell or trip occurs
✓ Quick checks Simple checks before removing panels. ⌄
  1. Note when the fault appears.
  2. Clean all accessible lint filters.
  3. Check the load size and programme.
  4. Inspect visible vents, condenser parts and the power lead.
  5. Unplug before touching internal parts.
If airflow was the cause: performance should improve immediately.
If electrical or mechanical faults remain: stop and call an appliance engineer.
1 Step 1 — Clean all accessible airflow paths Switch off and unplug before opening panels or touching internal parts. ⌄

Process

Switch off and unplug, then clean lint filters, condenser areas and external vents.

Success looks like: Airflow improves and heat returns.
Escalate when: If heat remains absent, internal testing is needed.
2 Step 2 — Check the programme and load Switch off and unplug before opening panels or touching internal parts. ⌄

Process

Confirm a heated cycle is selected and the drum is not overloaded.

Success looks like: The appliance heats normally.
Escalate when: A correct cycle with no heat points to a component fault.
3 Step 3 — Allow the dryer to cool fully Switch off and unplug before opening panels or touching internal parts. ⌄

Process

Leave it unplugged long enough for any manual-reset safety device to cool.

Success looks like: Heat returns after airflow is restored.
Escalate when: Repeated cut-out operation means the underlying cause remains.
⌁ Common causes explained Why tumble dryer faults develop. ⌄

A tumble dryer that runs without heat usually has blocked airflow, a tripped thermal cut-out, failed heater, thermostat fault or damaged wiring.

Airflow and heat are the biggest clues. Poor airflow causes long drying and overheating, while belt, motor and bearing faults affect drum movement and noise.

⌘ Advanced diagnostics Appliance-engineer checks and repair work. ⌄
  • Test heater resistance and insulation.
  • Check thermostats and thermal cut-outs.
  • Inspect wiring and connectors.
  • Verify airflow and fan operation.
  • Test control-board heater relay.
▣ Parts that may need replacing Common components linked to this fault. ⌄
  • Heating element
  • Thermal cut-out
  • Thermostat
  • Temperature sensor
  • Wiring harness
! When to call an appliance engineer Conditions that should end basic troubleshooting. ⌄
  • The dryer trips the electrics.
  • The cabinet overheats or smells burnt.
  • The drum is seized, grinding or not turning.
  • Internal electrical testing is required.
  • The dryer must be dismantled.
  • The same fault returns after basic cleaning.
? Frequently asked questions Common tumble dryer questions. ⌄

Why does the dryer stop and restart after cooling?

Thermal protection may be operating because airflow is restricted or a motor is overheating.

Can lint cause a fire?

Yes. Filters, vents and condenser areas should be kept clean and the appliance should never be used while overheating.

Should I keep resetting the electrics?

No. Unplug the dryer and arrange fault testing.