How do I know if my Toronto home dryer vent is clogged or restricted?

The most obvious sign of a clogged dryer vent is clothes taking significantly longer to dry — if loads that used to dry in 45 minutes now take 70 to 90 minutes or require a second cycle, your vent is almost certainly restricted. This is the earliest and most reliable warning sign, and GTA homeowners who catch it early avoid the more serious consequences of a fully blocked vent.

Beyond longer drying times, there are several other warning signs to watch for. Excessive heat is a major indicator — if the top of your dryer feels unusually hot to the touch during operation, or if your laundry room becomes noticeably warmer and more humid than normal while the dryer runs, exhaust air is not escaping efficiently and heat is building up inside the machine. A burning or musty smell during dryer operation means lint is overheating inside the vent duct and is a serious fire warning — stop using the dryer immediately and have the vent cleaned before running it again. Check the exterior vent cap while the dryer is running: the flap or louvres should be pushed open by a strong stream of warm air. If the flap barely moves, barely any air is escaping, or you see lint hanging from the cap opening, the vent is significantly restricted.

Visible lint accumulation around the dryer connection at the back of the machine, on the floor behind the dryer, or around the exterior vent cap are all signs that lint is backing up because it cannot exit through the blocked vent. If you pull the dryer away from the wall and see lint packed around the flexible transition hose connecting the dryer to the wall, the problem may be in that connector itself — these corrugated hoses trap lint and should be kept as short as possible.

GTA homes present specific challenges that increase the risk of dryer vent clogs. Townhouses and semi-detached homes frequently have dryer vents that run 15 to 25 feet with multiple 90-degree elbows to reach an exterior wall, creating many places for lint to accumulate. Every elbow is equivalent to approximately 5 feet of additional vent length in terms of airflow restriction. Older Toronto homes often have dryer vents made from flexible white vinyl duct, which sags between supports, collects lint in its ridges, and is a fire hazard that no longer meets code. If your home has vinyl dryer duct, have it replaced with rigid or semi-rigid aluminum duct as soon as possible.

To check your vent yourself, disconnect the dryer from the vent duct at the wall, look inside with a flashlight, and feel for airflow. You can also hold a piece of tissue paper near the exterior vent cap while the dryer runs — it should be blown away by strong airflow. Professional dryer vent cleaning costs $100 to $200 in the GTA and should be done annually. If your vent run is longer than 15 feet or has more than two elbows, consider cleaning every 6 months. A clogged dryer vent is not just an inconvenience — it is a fire hazard that causes hundreds of residential fires across Canada each year.