Five complaints account for the overwhelming majority of dryer service calls. No heat, usually a thermal fuse or heating element on electric models and an igniter or gas valve coil on gas. Long dry times, which is nearly always vent restriction rather than a machine fault. Loud rumbling or thumping, from worn drum support rollers or a failing idler pulley. A drum that will not turn while the motor runs, which is a snapped or stretched belt. And a dryer that does nothing at all when you press start, typically a door switch, a start switch, or a thermal fuse that has taken the whole control circuit out. All five are economical repairs on any dryer worth keeping.
The pattern worth noticing is that restricted airflow sits upstream of several of them. It blows thermal fuses, overheats elements, lengthens dry times, and shortens the life of nearly every component in the hot air path.
Dryer Faults by Frequency
| Rank | Problem | Most likely cause | Installed cost |
|---|---|---|---|
| 1 | Takes too long to dry | Restricted vent or lint path | $0 – $250 |
| 2 | Runs but no heat | Thermal fuse, element, or igniter | $180 – $420 |
| 3 | Loud rumbling or thumping | Drum rollers or idler pulley | $200 – $380 |
| 4 | Motor runs, drum will not turn | Snapped or stretched belt | $200 – $360 |
| 5 | Will not start at all | Door switch, start switch, thermal fuse | $180 – $300 |
| 6 | Stops mid-cycle | Cycling thermostat or overheating | $190 – $330 |
| 7 | Auto cycles end with damp clothes | Moisture sensor | $200 – $360 |
| 8 | Squealing or grinding | Idler pulley, blower wheel, or motor bearing | $220 – $480 |
| 9 | Clothes snagging or tearing | Drum seal or baffle damage | $220 – $420 |
| 10 | Burning smell | Lint on the element, or a seized bearing | Stop immediately; call |
| 11 | Dead panel or error code | Control board | $320 – $600 |
That burning smell row deserves emphasis. Cut power at the breaker and do not run the dryer again until it has been inspected, because lint igniting on a heating element is the mechanism behind dryer fires.
How to Tell the Noises Apart
Dryer noises are unusually diagnostic if you know what to listen for:
- Rhythmic thumping, once per drum revolution. Worn drum support rollers with a flat spot. Common past year eight, and replaced as a set.
- Continuous low rumble that grows over months. Drum rollers or the rear drum bearing.
- High-pitched squeal, worst at startup. Idler pulley. A cheap part and a straightforward repair.
- Scraping or grinding metal. Something loose in the blower housing, or a drum rubbing its bulkhead. Stop the dryer; this damages things quickly.
- Rattling that comes and goes. Usually a coin or a button in the blower wheel. Cheap to clear and worth clearing, because it will eventually crack the wheel.
- Humming with no tumble. Motor is energised but the drum is not turning: belt, or a seized component loading the motor.
The Airflow Connection
Several items on the frequency table are not independent faults. They are consequences of one upstream condition:
- Restricted vent raises drum temperature, which opens the thermal fuse. Rank two.
- Higher sustained temperature shortens heating element life, so elements fail earlier than they should. Also rank two.
- Restricted airflow lengthens every cycle, which means more running hours on rollers, belt, pulley, and motor. Ranks three, four, and eight.
- Lint accumulating inside the cabinet reaches the blower housing and the element. Rank ten.
So the cheapest thing you can do for a dryer is keep its exhaust clear. That one habit reduces the likelihood of most of the table above. The detail is on why does my dryer take so long to dry.
What You Can Address Yourself
With the dryer unplugged, several of these are approachable: cleaning the lint path and duct, replacing a door switch, fitting a belt, and changing drum rollers. Gas valve and igniter work requires a licensed gas fitter in Massachusetts, and 240V element work involves terminals that remain dangerous after a cycle ends.
The full DIY boundary is on can you repair a dryer yourself. For a diagnosis, book through washer and dryer repair, or see what each repair costs on how much does it cost to repair a dryer.