Direct answer: When a dryer runs but makes no heat, the most common causes are a wrong cycle setting, weak power on an electric dryer, restricted airflow that tripped a safety part, or a failed dryer heating component.
Most likely: Start with the cycle and vent checks, then separate electric-dryer power loss from a true internal heater failure. That keeps you from buying parts for a vent or supply problem.
A dryer can spin and still stay stone cold. On electric models, one leg of power can drop out and let the motor run with no heat. On gas models, poor airflow or a failed igniter or cutoff can stop the burner. Reality check: a packed vent can cause a no-heat complaint even when the dryer itself is still mostly fine. Common wrong move: replacing the dryer heating element before checking the vent and power supply.
Don’t start with: Do not start by ordering a dryer control board or gas valve parts just because the drum turns. Those are not the first suspects here.
The drum turns normally, but the air inside never gets warm and clothes come out just as wet as they went in.
Start here: Start with the cycle setting, then check whether the exhaust airflow is strong and whether the dryer is getting full power or gas.
You feel some warmth, but it is weak, and loads that used to dry in one cycle now need two or three.
Start here: Start with the lint screen, outside vent hood, and exhaust airflow before suspecting internal parts.
The dryer may warm up at first, then stop heating later in the cycle or on the next load.
Start here: Look hard at restricted airflow and safety parts that may be opening from overheating.
You may hear a click or brief ignition attempt, but there is no steady flame and no heat.
Start here: Confirm gas supply first, then suspect the dryer igniter or a heat-safety part rather than guessing at controls.
This is common after someone changes settings for delicates or fluff. The dryer runs normally but never calls for full heat.
Quick check: Set a timed dry or normal heated cycle, choose a higher heat level, and test with an empty drum for a few minutes.
A clogged lint screen housing, crushed vent hose, or blocked exterior hood can overheat the dryer and trip a thermal cutoff or make drying feel weak and cold.
Quick check: Run the dryer briefly and check for a strong, steady blast at the outside vent hood. Weak flow points to an airflow problem first.
An electric dryer motor can run on partial power while the heater gets none. A gas dryer can tumble with the gas shut off or interrupted.
Quick check: For electric, check for a tripped double breaker or half-tripped handle. For gas, make sure the gas shutoff is open and other gas appliances are working if applicable.
Once settings, airflow, and supply are ruled out, the usual internal failures are the dryer heating element, dryer thermal fuse, dryer thermal cutoff, dryer high-limit thermostat, or dryer igniter on gas models.
Quick check: If the dryer has good airflow and proper supply but stays cold on every heated cycle, internal testing is the next step.
Wrong settings are easy to miss and cost nothing to fix. You want to rule that out before chasing parts.
Next move: If heat returns, the problem was the setting or cycle choice. Run a normal load and confirm dry time is back to normal. If the drum is still cold or only barely warm, move to airflow next.
What to conclude: You have ruled out the simplest no-heat cause and can focus on airflow, supply, or failed heating parts.
Poor airflow is one of the most common reasons dryers stop heating well or blow a safety fuse. It also changes what parts make sense later.
Next move: If the dryer heats better with the vent disconnected, the dryer likely has an airflow problem in the vent path rather than a failed heater part. If it stays cold even with the vent disconnected and the lint path looks clear, move to the supply check.
What to conclude: Strong heat with the vent off points to a blocked or restricted exhaust path. No heat with the vent off points back to power, gas, or internal dryer parts.
A dryer that tumbles but does not heat often has a supply issue, and the clues are different for electric and gas models.
Next move: If resetting the breaker restores heat on an electric dryer, monitor it closely. If it trips again, the supply or dryer needs further diagnosis. If supply checks do not restore heat, the problem is more likely inside the dryer.
Once settings, airflow, and supply are ruled out, the usual failures are a small group of dryer-specific parts. This is where diagnosis starts to support buying a part.
Next move: If one part tests open while the related circuit parts test good, you have a supported repair path and can replace that failed dryer part. If all common heat-circuit parts test good, the diagnosis is no longer simple and a wiring issue or control problem becomes more likely.
A no-heat repair is not finished until the dryer heats normally and the airflow problem, if any, is corrected so the new part does not fail again.
A good result: If the dryer now heats and airflow is strong, the repair is complete.
If not: If the dryer still tumbles with no heat, the remaining possibilities are wiring, timer, or control issues that need model-specific testing.
What to conclude: A successful repair gives you both heat and good airflow. If a safety part failed and the vent was never corrected, the same problem can come right back.
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The usual reasons are a no-heat cycle setting, poor vent airflow, partial power loss on an electric dryer, no gas supply on a gas dryer, or a failed dryer heating part such as the heating element, thermal fuse, thermal cutoff, thermostat, or igniter.
Yes. An electric dryer can sometimes tumble on partial power while the heater gets none. That is why a half-tripped double breaker is one of the first things to check.
Yes. A restricted vent can make the dryer overheat and open a safety part like a dryer thermal fuse or dryer thermal cutoff. It can also cause very weak heat and long dry times even before a part fails.
On an electric dryer, the heating element is a strong suspect after you confirm full power and good airflow. A broken coil or an open continuity reading supports replacing the dryer heating element.
After gas supply is confirmed, the common no-heat parts are the dryer igniter and the heat-safety parts in the burner circuit. If the igniter never glows, that is a strong clue.
No. A dryer thermal fuse often fails because the dryer overheated, and restricted airflow is a common reason. If you replace the fuse without fixing the vent problem, the new part may fail again.