Signs of a Clogged Dryer Vent

The clearest signs of a clogged dryer vent are loads taking longer than one cycle, a dryer that is hot to the touch, a burning smell during operation, visible lint around the exterior flap, and a laundry room that turns warm and humid mid-cycle. Any one of these means restricted airflow; two or more means book a cleaning now.

The signs, in order of how often we hear them

• Two cycles to dry a load. The most common and most ignored sign. A healthy dryer moves moist air out fast; a restricted vent traps that moisture, so clothes tumble in their own steam. If towels used to dry in one cycle and now need two, the vent is the first suspect — before you blame the machine.
• Hot drum, hot clothes, hot laundry room. Heat that cannot exit through the vent backs up into the machine and the room. Clothes that come out unusually hot are a red flag, not a feature.
• Burning or scorched smell. Lint sitting on heating elements or packed in a hot duct. Stop using the dryer and get the vent inspected — this is the sign closest to an actual dryer fire.
• Lint fringing the exterior hood. Walk outside while the dryer runs. You should feel strong, warm airflow and see the flap held fully open. Weak flow, a barely-moving flap, or a beard of lint around the hood all point to a blockage.
• Humidity or condensation in the laundry room. Moist exhaust escaping into the house instead of outside. In winter this can show up as frost on nearby windows.
• The dryer shuts off mid-cycle. Modern dryers have high-limit switches that trip on overheat. Repeated shutdowns are the machine protecting itself from a blocked vent.

Alberta winter caveats

In January, check the simple thing first: a snowdrift or ice buildup over the exterior hood produces every symptom above. Clear it — but know that a vent that iced over has usually bound moisture into the lint inside the duct, so a professional cleaning is still worth booking once you have had the warning.

If you are seeing these signs, a cleaning runs $120–180 for most homes and takes under an hour. Request service here; our intake assistant will ask about your symptoms, dryer type, and vent layout, and get a vetted local technician to follow up.