What does it mean when a tumble dryer is not heating up?
A tumble dryer that is not heating up has lost its heat source or has cut the heat to protect itself.
- Cold air from the start: the cut-out, thermal fuse or heating element is open.
- Heat that fades after minutes: restricted airflow is tripping a thermostat.
- Warm air but damp clothes: moist air is not leaving the dryer.
- Drum not turning: a different fault in the belt, motor or door switch.
Common causes of a tumble dryer not getting hot
A tumble dryer not getting hot has restricted airflow or an open heater circuit. You can check the airflow. The heater circuit needs a technician.
At a glance
| Cause | Typical sign | Who fixes it |
|---|---|---|
| Lint filter | Heat fades after minutes | You can check this |
| Vent hose | Humid room, damp clothes | You can check this |
| Water tank or pump | Warning light shows | You can check this |
| Condenser unit | Long cycles, damp clothes | You can check this |
| Cut-out or thermal fuse | Drum turns, cold air | Technician |
| Heating element | Cold from the start | Technician |
| Thermostat or NTC sensor | Erratic heat, error code | Technician |
| Heat pump circuit | Hours of running, wet clothes | Technician |
- 1
The lint filter is blocked
You can check thisThe lint filter catches fibres leaving the drum. A blocked filter chokes the airflow, so the heater overheats and cuts out after a few minutes. Clean it after every load.
- 2
The vent hose is kinked or blocked
You can check thisOn a vented dryer, the hose carries hot, damp air outside. A crushed hose or clogged outlet traps that air, so the room turns humid and clothes stay damp. Straighten and clear it.
- 3
The water tank is full or the pump is blocked
You can check thisA condenser dryer pumps the water it removes into a tank or drain hose. A full tank or blocked pump stops the programme and lights a warning. Empty the tank. A technician repairs the pump.
- 4
The condenser unit is blocked
You can check thisThe condenser unit cools the damp air so the water drops out. Lint between its plates blocks the airflow and drying takes far longer. On most condenser dryers it slides out and rinses clean.
- 5
The thermal cut-out or thermal fuse has opened
TechnicianBoth are safety devices that open when the heater overheats. Blocked airflow, or stopping a hot dryer mid-cycle, trips them. The drum turns but the air stays cold. A technician resets the cut-out or replaces the fuse.
- 6
The heating element has failed
TechnicianThe heating element heats the air entering the drum on vented and condenser dryers. Its wire breaks with age or repeated overheating. The air is cold from the start. A technician replaces it.
- 7
The cycling thermostat or NTC sensor is faulty
TechnicianThis part measures the air temperature and switches the heater. A faulty one keeps the heater off, or lets it overheat until the cut-out trips. Electronic dryers often show an error code. A technician replaces it.
- 8
The heat pump circuit has a fault
TechnicianA heat pump dryer heats the air with a compressor and a sealed refrigerant circuit. A leak or failed compressor leaves clothes cold and wet after hours. This is sealed-system work for a refrigeration technician.
What you can safely check yourself
- Switch off and unplugSwitch off at the plug point and unplug the dryer first.
- Check the programmeSelect a heated programme. Airing programmes run cold.
- Clean the lint filterRemove all lint and rinse any film off the mesh.
- Clear the vent hose or condenserStraighten and clear the hose, or rinse the condenser unit under a tap.
- Empty the water tankEmpty the tank and push it fully home.
When to stop and call a technician
Stop and unplug the dryer if you smell burning, if it trips the earth leakage or a breaker, or if water lies under it. Stop if the heat fails again after a reset. Do not remove panels to reach the heater, wiring, control board or heat pump system.
Still having trouble with your tumble dryer?
Our technician comes to your home, usually the same day. The R450 call-out falls away if you go ahead, and you get a fixed price in writing before any work starts.
How a technician diagnoses a tumble dryer not heating
- Checks the airflowThe fan, ducting and vent or condenser are checked for lint.
- Tests the safety devicesThe thermal cut-out and thermal fuse are tested for continuity.
- Tests the element and sensorThe heating element and the thermostat or NTC sensor are measured with a multimeter.
- Checks the control or heat pumpThe control board output is checked last, or the sealed circuit on a heat pump dryer.
Why is my tumble dryer not drying clothes properly?
A tumble dryer that heats but is not drying clothes properly cannot remove the moisture, or the load is too wet. Clear the filter, vent hose and condenser unit, and do not pack the drum full. Dripping laundry points to a washing machine that is not spinning.
Why is my tumble dryer tripping my electric?
A tumble dryer trips the electricity when current leaks to earth inside it or it overloads the circuit. A broken heating element touching its metal housing is a common cause. Do not keep resetting the DB board. Unplug the dryer, because this needs tumble dryer repair by a technician.
Is a tumble dryer that is not heating worth repairing?
Repair usually makes sense when
- The fault is a cut-out, fuse, thermostat or element
- The drum, bearings and motor run quietly
- Parts for the model are available
Replacement is worth considering when
- A heat pump dryer has a sealed-system fault
- The bearings, motor and heater are all worn
- The cabinet or drum is badly rusted