Tumble dryer not drying: what to check safely

Check airflow before running another cycle.

The answer in 2 lines. Check the lint filters, water container or drainage arrangement, ventilation and selected drying programme. Clean only the parts identified as user-accessible in your instructions. A smaller, properly spun load may help. Stop using a dryer that smells burnt, overheats or repeatedly cuts out, and check official safety notices before restarting it.

The first checks

Check the filters. Unplug the dryer, let it cool and clean the user-accessible lint filters as instructed. Refit them before use.
Check the appropriate water or air route. Depending on the model, inspect the water container, accessible drain arrangement or vent hose for an obvious obstruction.
Review the load and programme. Follow garment labels and the programme's capacity. Separate tangled items and check that the washing machine spun the load properly.

Stop: danger

Burning smell, unusual overheating or repeated cut-outs: stop using the appliance. Disconnect only if safe, and arrange professional assessment before restarting.
Smoke or fire: leave immediately, close doors behind you if safe and call 999 from outside. Do not open the appliance or tackle the fire.
Escape route blocked: follow the official fire escape guidance: get behind a closed door, call for help and tell the emergency operator where you are.

Why clothes can stay damp

Restricted airflow, an overloaded drum or an unsuitable setting can reduce drying performance. A dirty sensor can also affect automatic programmes. Heating, motor and control faults require assessment; a cool load at the end of a programme does not by itself identify a failed heater.

Use Which?'s tumble dryer maintenance guide to find the relevant symptom and cleaning section. Follow your own manual for access and cleaning methods, and leave internal electrical work to a qualified repairer.

Maintenance depends on the dryer

A vented dryer needs an unobstructed exhaust route. A condenser or heat-pump dryer has different filters and water arrangements. Clean a heat exchanger or condenser only where the instructions expressly allow it; do not assume it can be removed or rinsed.

If the manual identifies accessible moisture sensors, use its specified cleaning method. Keep ventilation openings clear and check that the installation location meets the appliance requirements. Never bypass a safety device or reset an internal cut-out as a troubleshooting experiment.

What not to do

Running repeated cycles without investigating worsening drying performance.
Leaving the dryer operating while you are out or asleep.
Removing covers, working on electrical parts or using an appliance with missing or damaged filters.

Check recalls before booking a repair

Find the model and serial details without moving an unsafe appliance. Open the official product recall search, search the appliance details and compare the identifiers in any notice. Follow a matching stop-use instruction even if your dryer appears to work normally.

For a repair enquiry, describe the programme, load, warning messages and maintenance already completed. Ask for written diagnostic, labour, parts and repeat-visit charges before authorising work. Do not order a replacement heater on the assumption that damp clothes prove a heating fault.

Who to contact in England

If you bought the dryer from a trader, contact the seller before paying for a repair that might fall under your statutory rights. Explain the fault in writing and keep proof of purchase. A commercial warranty is additional protection; its expiry does not automatically remove your rights.

For a qualifying fault appearing within six months, the seller normally has to show it was not present at delivery. Later, you may need evidence. Ordinary wear, misuse and accidental damage are different from an inherent fault.

Use Citizens Advice's England guidance to check the available remedy. Its country selectors lead to advice for Wales, Scotland and Northern Ireland.

Good to know

Clean the lint filter after every load. Use London Fire Brigade's appliance safety guidance to review filter care and what to do about safety concerns.
Keep fault records and correspondence with the seller. They are more useful for a repair discussion than repeatedly running the same unsuccessful programme.

Illustrative example: in Bristol, Priya notices drying performance deteriorating. After unplugging the cool appliance, she checks its instructions and finds an additional user-accessible filter she had overlooked. She cleans and refits it as directed. If the problem persists, she will stop repeating cycles and seek an assessment; any burning smell would mean stopping use immediately.

A made-up story, for illustration.

Bobby

Sources, verification, confidence

Verified on 5 November 2026, for England. Confidence: high for fire precautions, recall checking and general consumer rights; medium for troubleshooting because dryer designs differ. No repair price, universal operating temperature or national breakdown statistic is asserted.