The drum turning tells you the motor and belt are fine. Heat is a separate system, and on an electric dryer it's a hungry one: the heating circuit pulls the full 240 volts, while the motor runs on half that. That's why so many "no heat" dryers still spin happily — half the machine has power and half doesn't. Work through these checks in order. They're arranged cheapest first, and most dryers give up their secret in the first three.
The wrong cycle is selected. It sounds too simple, which is exactly why it's missed. Air-fluff and some delicate cycles tumble with no heat by design, and a dial bumped mid-week can sit there for days. Check the setting, then run a timed dry cycle on high heat for ten minutes before you touch a tool.
The breaker half-tripped. Electric dryers use a two-pole breaker — two switches joined together. One side can trip while the other stays on, which leaves the drum spinning on 120 volts with no power to the heater. At your panel, push the dryer breaker firmly all the way off, then back on. This one check revives a surprising number of "broken" dryers.
The vent is clogged. A dryer with nowhere to push hot, wet air dries slowly at first, then overheats. Pull the vent hose off the back and look inside; check the outside flap while the dryer runs — it should open fully with a strong blast of air. A weak, lazy puff means a lint dam somewhere in the run. This is also the maintenance job that prevents half the failures below, and our dryer vent cleaning guide walks through it. While you're there, wash the lint screen with soap and water; dryer-sheet residue coats it invisibly and strangles airflow.
The thermal cut-off blew. Mounted on the heater housing is a small one-time cut-off (often sold as a kit with the high-limit thermostat). When the dryer overheats, it opens and stays open — the element never gets power again, but the drum keeps turning. Unplug the machine, pull the back panel, and test it with a multimeter: no continuity means it's dead. Cut-offs almost never die of old age — they die because the vent in step 3 was clogged. Replace the cut-off and clean the vent, or you'll be buying a second kit in a month. (A close cousin, the thermal fuse on the blower housing, usually kills the whole dryer when it goes — different symptom, same root cause.)
The heating element failed. The element is a coil of wire, and coils eventually break. Often you can see the break or a blistered, sagging section once the back panel is off. A multimeter confirms it — a good element shows continuity, a broken one shows none. Replacing one is a moderate job: a few screws, two wires, and patience with sheet metal edges. If the idea makes you uneasy, this is a reasonable place to hand it to a repair tech.
Gas dryer: the igniter or gas valve coils. On a gas model, watch the burner area through the small front inspection opening if your model has one. The igniter should glow bright orange; if it glows, clicks off, and no flame follows, the gas valve coils are the usual suspect. Igniters and anything on the gas side belong to a qualified tech — that's a firm line, not a suggestion. Gas connections are not a learning project.
| Part | Typical part cost | DIY difficulty |
|---|---|---|
| Thermal cut-off kit | About $10–$25 | Easy — panel off, two screws |
| Heating element | Roughly $30–$80 | Moderate — an hour for most people |
| Igniter (gas) | Roughly $15–$40, plus labor | Pro job — gas appliance |
| Service call (diagnosis) | Often $100–$200 | — |
Those are parts-counter ranges, not quotes; your model's parts may sit above or below them. Still, the math is why the diagnosis order matters — a $10 fuse and a $150 service call present exactly the same symptom.
The parts cannon. Ordering an element, a thermostat, and a timer because "one of them must be it." Ten minutes with a multimeter names the actual culprit. Guesswork gets expensive fast and usually installs the new parts in the wrong order anyway.
Replacing the cut-off and nothing else. The cut-off is a messenger. If you don't clear the vent that overheated the dryer, the new one blows on the same errand.
Assuming it's dead. A dryer that spins but won't heat is rarely a dead dryer. The motor, drum, and controls — the expensive half — are demonstrably working. Before shopping for a replacement, it's worth a look at how long home appliances last; a mid-life dryer with a blown fuse has years left in it.
If the breaker trips again right after you reset it, or the outlet shows scorching or a melted plug, stop — the problem has moved from the dryer to the house wiring, and that's electrician territory. Knowing roughly what an electrician charges helps you spot a fair quote when you make that call.
Bottom line: Check the cycle, flip the breaker properly, and clear the vent before you spend anything. Those three free checks solve a large share of no-heat dryers, and the next suspect — the thermal cut-off — costs less than the pizza you'd order while waiting for a repair appointment.
Because spinning and heating run on different circuits. The motor needs only half the dryer's 240-volt supply, so a half-tripped breaker, a blown thermal cut-off, or a dead element all leave the drum turning with cold air. Start with the breaker, then the vent, then the cut-off.
There are two parts people mean by this. The thermal cut-off on the heater housing kills the heat only — test it with a multimeter on continuity; a blown one reads open. The thermal fuse on the blower housing usually stops the dryer from running at all. No multimeter? Most parts stores will test either part at the counter for free.
Yes — indirectly. Trapped hot air overheats the dryer until the thermal cut-off kills the heater for good. The vent clog is the cause; the cut-off is just where the failure shows up. Cleaning the vent is both the fix and the prevention.
Usually, yes. The common causes are a $10–$25 cut-off kit or a mid-priced element, while the motor and drum — the costly parts — are still working. Repair makes less sense when the machine is past roughly 12 years old and needs several parts at once.
Most dryers run about 10 to 13 years with basic care, and vent cleaning is the biggest lever on that number. A dryer that overheats regularly from a clogged vent ages much faster than one that breathes freely.