The dryer hums, the drum turns, the timer counts down, and the towels come out cold and wet. It is a frustrating failure, but it is also one of the more predictable ones. A dryer makes heat through a short chain of parts, and when any link opens, the motor keeps running while the heat stops. The way the dryer fails tells you a lot about which link broke. Below are the most common patterns, the checks you can safely make, and how to think about the repair once you know the cause.
How the heat circuit works, briefly
An electric dryer passes 240-volt current through a coiled heating element. A gas dryer uses a hot-surface igniter to light a burner after coils on the gas valve open it, and a flame sensor confirms the flame. Both types route heat through safety devices: a thermal fuse that opens permanently if the dryer overheats, a high-limit thermostat that cuts heat at excessive temperatures, and a cycling thermostat or thermistor that holds the normal drying temperature. A blower pulls the hot, moist air through the drum and out the vent. If airflow drops, temperatures climb and the safety parts start doing their job.
Reading the clues
Cold from the very first minute
No warmth at all, on any setting, usually means something in the circuit is fully open. On electric dryers, the leading suspects are a tripped leg of the double-pole breaker, a blown thermal fuse or a broken element. On gas dryers, look at the igniter: if it never glows, the igniter, the thermal fuse or the flame sensor is likely at fault. On some models a blown thermal fuse stops the motor too, so a dryer that will not start at all can still be a heat-circuit problem.
Warm for a few minutes, then cold
Heat that starts and then quits points to either a safety part tripping because the dryer is overheating or a part that fails as it warms up. A restricted vent is the classic cause of the first; the high-limit thermostat keeps cutting the heat. On gas dryers, weak gas valve coils are the classic cause of the second: the igniter glows, the flame lights or nearly lights, and then it goes out partway through.
Hot, but the clothes are still damp
This is almost always airflow. The heat is there, but the moisture cannot leave. Look at the lint screen, the duct behind the dryer, the full vent run and the exterior hood. In humid weather, long runs can also collect condensation that mixes with lint into a heavy paste. Our guide to dryer vent cleaning on long runs explains what to look for.
Too hot, or heat that will not shut off
Stop using the dryer. A failed cycling thermostat or an element shorted to its housing can let the temperature run past safe limits. This is the one heat problem that should not wait.
A local note: most homes in the Tampa Bay area have electric dryers, because many neighborhoods are all-electric, though gas dryers turn up where natural gas service is available. Electric models make the breaker check below especially worthwhile after a summer thunderstorm. Gas models add the igniter and valve coils to the list of suspects, and they bring a stricter rule about leaving the gas side alone.
Checks that are safe for an owner
- Settings: make sure the dryer is not on air-fluff, a delicate low-heat setting, or a cooldown stage.
- Breaker: for electric dryers, switch the dryer's double-pole breaker fully off and back on. Lightning and outages can trip one side without tripping the other.
- Lint screen: clean it, then run water over it. If water beads on the mesh, a film from dryer sheets is blocking air; wash it with mild soap and a soft brush.
- Exterior vent: with the dryer running, go outside and feel the vent hood. You should feel a strong flow of warm air and see the flaps open. Weak flow means a restriction.
- Transition duct: unplug the dryer, pull it out gently and check that the duct behind it is not crushed or disconnected.
Leave panels on and parts alone beyond that. Electric dryer terminals carry 240 volts while plugged in, and gas connections are not owner work. If you smell gas, do not touch light switches or the dryer; leave the home and call your gas utility or 911 from outside.
What gets tested on the service call
A technician confirms supply voltage, then checks the thermal fuse, thermostats and element or igniter for continuity and resistance with the power off, and watches the heating sequence on gas models. The goal is to find both the failed part and the reason it failed. A fuse replacement without a vent check is a temporary fix. Our dryer repair service covers electric and gas models, and many of the heat parts involved are carried on the van, though model-specific parts sometimes need to be ordered.
Repair or replace: matching the cause to the decision
Thermal fuse, thermostat or breaker issue: repair. These are small parts, and the vent cleanup that should come with them benefits the next dryer anyway.
Heating element: repair in most cases. Elements are a common wear item, and replacing one restores full function.
Igniter or gas valve coils: repair. Both are standard gas dryer parts.
Control board or timer: usually repair on a dryer under about ten years old in good mechanical shape. On an older dryer, ask about parts availability.
No-heat plus worn drum bearings, a noisy motor, rust through the drum or a cabinet in poor shape: this is where replacement starts to make sense. A dryer is a simple machine and often outlives the washer next to it, so the deciding factor is usually the overall condition rather than the heat part itself.
Brand rarely changes these answers. If you own a Whirlpool or Maytag dryer, our Whirlpool dryer page describes the parts that line uses. For most households, a dryer that stopped heating needs one modest part and a clear vent, and it goes back to drying a load in a normal cycle.