If your dryer is running but not heating, start with the cycle setting, then check the power or gas supply and the airflow path. A turning drum does not prove the heating system has power. On some electric dryers, the motor can run even when the electrical supply needed for heat is missing.
Stop using the dryer if you notice a burning smell, scorching, smoke, a damaged cord or outlet, repeated breaker trips, or signs of a blocked exhaust. If you smell gas, leave the area and contact your gas utility or emergency service from a safe location. Do not operate switches or try to restart the dryer.
First, confirm whether the dryer is actually producing heat
Clothes that remain damp do not always mean the heater has failed. The machine may be warming normally but struggling to move moist air out of the drum.
- Remove the laundry and clean the lint screen as directed in your owner’s manual.
- Select a heated Timed Dry cycle rather than Air Only, Air Fluff, or a no-heat setting.
- On a conventional vented dryer, let the empty machine run for about five minutes, then stop it and carefully check whether the drum interior feels warm. Follow your model’s instructions and avoid touching hot metal surfaces.
- If the drum is warm, investigate airflow and drying performance. If it remains cool, move on to the supply checks below.
This short check is intended for conventional dryers with a heated timed cycle. Heat-pump dryers and some specialty models manage temperature differently, so use their manual’s troubleshooting method instead.
Check the simple causes before replacing parts
1. Make sure a no-heat setting is not selected
Air Only and Air Fluff deliberately tumble without adding heat. Some wrinkle-prevention or cool-down portions of a program also run without active heating. Choose an ordinary heated program suitable for the fabric and repeat the empty-drum check. If heat returns, there may be nothing to repair.
2. Check the circuit breakers on an electric dryer
In the United States and Canada, many full-size electric dryers use a 240-volt supply served by a two-pole breaker. A supply fault can leave enough power for the motor and controls while preventing the heater from operating.
Look for the dryer’s correctly labeled breaker at the household panel. If it has tripped, follow the panel manufacturer’s reset instructions only if there is no burning smell, visible damage, or other warning sign. Do not repeatedly reset a breaker that trips again. Have an electrician investigate. Never open the outlet, remove a terminal cover, or measure live voltage yourself for this check.
Gas dryers and dryers sold in the UK, Ireland, Australia, and New Zealand may use different electrical arrangements. Do not apply North American 240-volt or breaker assumptions to those appliances. Use the rating plate and local installation instructions.
3. Check the gas supply on a gas dryer
On a conventional gas dryer, the drum can turn even if the burner has no gas supply. If the accessible shutoff valve is clearly identified and there are no signs of a leak, compare its position with the dryer’s installation instructions. On common quarter-turn gas valves, a handle parallel to the pipe usually indicates open.
Do not loosen fittings, test for leaks with a flame, relight components manually, or work on the burner assembly. If the valve position is uncertain or the supply seems abnormal, contact the gas provider or a qualified gas technician.
Check the lint screen and dryer vent
A blocked lint screen, crushed vent hose, or obstructed outdoor outlet can cause long drying times. Depending on the model, severe airflow restriction may also trigger an over-temperature safety device or a vent-related alert. A vent problem is not proof that the heating element has failed.
- Turn the dryer off. Remove lint from the screen and reinstall it correctly. If residue is present, clean the screen only as the manufacturer permits and let it dry completely.
- With the dryer switched off and safely accessible, look behind it for a visibly crushed or sharply kinked vent hose. Do not strain the power cord or gas line by pulling the machine forward.
- Check the exterior exhaust hood for visible lint or an obstructed flap, without reaching into moving parts or climbing unsafely.
- If the duct is inaccessible, heavily clogged, damaged, or repeatedly triggers a blockage alert, arrange appropriate vent cleaning and inspection before regular use.
Do not operate a conventional vented dryer with its exhaust disconnected as a routine workaround. Lint, heat, moisture, and, on gas dryers, combustion products must be exhausted according to the manufacturer’s instructions. A ventless or heat-pump dryer instead requires the applicable filter, condenser, and drainage maintenance described in its manual.
What different symptoms suggest
| What you notice | What it may indicate | Best next step |
|---|---|---|
| Drum turns, but stays completely cool on a heated cycle | Incorrect setting, missing heating supply, or a heating-system fault | Check the cycle and external supply first |
| Drum warms, but clothes take several cycles to dry | Restricted airflow, overloading, or a drying-control issue | Check filters, ducting, and load size |
| Dryer heats briefly, then blows cold | Possible airflow restriction or temperature-control fault | Stop if overheating is suspected; request service if persistent |
| Breaker trips again after resetting | Potential electrical fault | Stop using the dryer and call a qualified electrician |
| Gas dryer tumbles without warmth | Closed supply valve or ignition/heating-system problem | Check only the accessible supply; have the burner system serviced |
When an internal heating part may be faulty
If a heated cycle is selected, the external supply is correct, and the airflow path is clear, an internal fault becomes more likely. The suspect parts depend on the dryer’s design and model, so buying a heating element based on the symptom alone can waste money.
Electric dryer heating element and temperature controls
Conventional electric dryers often use a resistive heating element together with temperature sensors or thermostats and protective cutoffs. A failed element, open thermal cutoff, control fault, or damaged connection can prevent heating. The correct diagnostic sequence depends on the service documentation.
A thermal fuse is not always a no-heat fuse: on some dryers it interrupts the motor circuit, while other protective devices interrupt heat. Do not assume the same fuse behavior across brands or models. Never bypass a fuse, thermostat, or thermal cutoff, even temporarily.
Gas dryer igniter, flame sensor, and gas valve components
A gas dryer may have a faulty igniter, flame-sensing component, gas valve coil, safety cutoff, or control. These faults can look similar from outside the cabinet. Diagnosing or replacing gas-system parts involves fire and gas hazards and should be left to an appropriately qualified technician.
Heat-pump and condenser dryers
Not every dryer has a conventional exposed-to-service heating element or an outdoor exhaust duct. Heat-pump models use a refrigerant-based system and may operate at lower temperatures. If cleaning the user-serviceable filters and condenser areas described in the manual does not restore performance, seek model-specific service. Do not open the sealed refrigerant circuit.
Should you reset the dryer?
A reset can clear certain temporary control conditions, but it cannot repair a failed heater, restore a missing supply leg, or remove lint from a blocked duct. If your manual provides a standard power-reset procedure, you may follow it after addressing any obvious safety problem. There is no universal button combination for every brand.
If the dryer resumes heating but the fault returns, note the exact displayed message, model number, and when the heat stops. Those details are more useful to a technician than repeating resets.
When to stop troubleshooting and arrange repair
Book professional help if the drum stays cold after you confirm a heated cycle and the appropriate external supplies, if heat cuts out repeatedly, or if the dryer displays a persistent error. Contact an electrician for suspected outlet or circuit faults, a qualified gas technician for gas-supply or burner issues, and an appliance service provider for internal dryer diagnosis.
Before calling, record whether the appliance is electric, gas, condenser, or heat-pump; its full model number; whether the empty drum warmed; any error displayed; and whether drying times changed gradually or suddenly. This helps distinguish a straightforward supply or airflow problem from an internal repair.
Bottom line: For a dryer that runs but will not heat, verify the chosen cycle first. Next check the appropriate household supply and visible airflow restrictions. If those checks do not explain the cold drum, avoid guessing at parts and have the heating system diagnosed for your particular model.
Daniel Brooks is a US-based appliance troubleshooting researcher with 12 years of experience studying washer, dryer, refrigerator, and dishwasher faults. He reviews manufacturer manuals and converts technical error codes into safe, practical guidance for homeowners.