What it usually means, the likely causes in order, what to safely try first, what a pro charges in Canada, and when to stop and call one.
This guide covers the common cases. Describe your exact problem and get a personalized diagnosis — free to start, with a DIY vs. call-a-pro verdict and a real cost estimate.
A dryer that tumbles, blows, and runs a full cycle but leaves the clothes damp has lost its heat while keeping its motion — and the most common reason isn't a part at all. It's airflow: a lint-choked vent run makes the dryer overheat internally, trips its safety devices, and in the worst cases becomes a fire risk, which dryers' thermal fuses exist to prevent. Only after the vent is proven clear do the actual heating parts — thermal fuse, element, or gas igniter — become the story. Treat this guide as airflow first, parts second, and never bypass a thermal fuse to 'test' — that fuse blew because something got too hot.
Inconvenient rather than dangerous once you stop using it — hang-dry while you work through it, and don't keep running repeated cycles hoping for heat; a dryer struggling against a blocked vent is under exactly the stress that causes fires. If you smell scorching or the top of the machine is unusually hot, unplug it and deal with the vent before anything else. A blocked vent found and cleared is also the prevention for the next failure.
The trap catches some lint; the rest coats the vent pipe to the outside, especially long runs with bends or a crushed flexible section behind the machine. Restricted airflow makes cycle times stretch first, then the heat fails as safety devices intervene. If drying has been getting slower for months, the vent is suspect number one.
This one-time safety fuse cuts heat when the dryer overheats — typically because of the vent problem above. Once blown, the dryer tumbles cold until the fuse is replaced AND the overheating cause is fixed; replacing the fuse alone usually earns you a second blown fuse.
The element's coil can burn through and break, visible as a visible gap in the coil. Electric dryers with a dead element tumble perfectly with room-temperature air — no partial heat, just none.
Gas dryers light their burner with an igniter and sense the flame with sensors; a weak igniter glows without lighting, or lights and dies. Early in the failure you may get heat that quits partway through the cycle, then no heat at all.
Less common: the thermostats that cycle the heat on and off fail in the off position, or the timer/control never calls for heat. These sit behind the parts above on the checklist because they're harder to confirm without testing equipment.
| Job size | Typical estimate (CAD) |
|---|---|
| Simple fix — the straightforward version of this repair | $110–$250 |
| Major job — complex, hidden, or replacement-level work | $300–$900 |
Estimates only, calibrated to Greater Toronto Area trade rates and adjusted by region on this site — not a quote. Your exact price depends on the cause, parts, and access. A personalized diagnosis narrows this range using your specific symptom.
Lint trap, external vent hood, the flexible hose behind the machine, and setting checks are owner work — and they fix the most common cause. A full vent-run cleaning (long or in-wall runs) is worth a pro or a vent-cleaning kit with a drill brush if the run is long. Thermal fuses and elements are common DIY-adjacent parts on electric dryers with power disconnected, but if you're not comfortable testing continuity and working inside the cabinet, a pro's visit is cheap next to a misdiagnosis — and any gas-side work beyond the supply valve stays with licensed technicians.
The lint trap needs cleaning every load. The vent run deserves a check at least yearly — more often for long runs, runs with bends, or households doing heavy laundry volume. The practical gauge is drying time: loads that used to dry in one cycle starting to need two is the vent asking for attention long before the heat fails entirely.
Setting-dependent heat usually means one heat path works: on electric models, some cycles use different element configurations; on any model, a failing timer or control may deliver heat on timed cycles but not automatic ones (or the reverse). Record exactly which settings heat and which don't — that pattern is a real diagnostic shortcut for a technician and rules out a totally dead element.
Briefly, as a test, yes for an electric dryer — if it heats with the hose off, the machine is fine and the vent run is the fault. (For gas dryers, don't: their exhaust carries combustion gases that must vent outside.) Don't make it a habit even for electric — it fills the room with lint-laden moisture. Reconnect the vent before returning to normal use.
Because the fuse is a symptom, not the disease. It blows when airflow is restricted or the machine overheats for another reason, and a new fuse in an unchanged dryer inherits the same conditions. When a fuse blows twice, the vent run and the cycling thermostat need real investigation rather than a third fuse.
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