If your dryer is not drying clothes as quickly as it used to, a restricted vent could be one cause. Lint can build up beyond the lint screen, narrowing the path that carries warm, moist air outdoors. The dryer then has to work harder to move air, and drying can take longer.
A clogged vent is not the only possible explanation. A dirty lint screen, an overloaded drum, a cycle setting or an appliance fault can also affect performance. The warning signs below can help you decide what to check and when to arrange an inspection. If you notice smoke or a burning smell, stop using the dryer and follow the safety steps below.
1. Clothes need multiple cycles to dry
If clothes not drying in the dryer has become a regular problem, or familiar loads now need more than one cycle, airflow may be restricted. When moist air cannot escape freely through the vent, clothes can stay damp at the end of a normal cycle.
What to check first: Clean the lint screen and make sure the load is not too large for the drum. Check that you have selected an appropriate cycle for the items being dried. If the problem continues across several loads, avoid repeatedly running extra cycles and arrange a vent inspection.
2. Clothes come out hotter than usual
A blocked or restricted vent can interfere with how heat and moisture leave the dryer. If clothes feel unusually hot at the end of a cycle, pay attention to whether this happens repeatedly or alongside longer drying times.
What to do: Stop the dryer if the heat seems excessive, and let it cool. Check the lint screen and the accessible hose for a visible kink or crushing, but do not pull on a gas line or force the dryer out of position. If the heat returns, have the dryer and vent checked before using it again.
3. The dryer or laundry room feels unusually hot
Heat that builds around the dryer or makes the laundry area noticeably warmer than usual can be a sign that hot exhaust is not leaving as it should. The dryer itself may also feel hotter than normal. A vent restriction is one possible cause, though an appliance problem can produce similar symptoms.
What to do: Stop using the dryer if it becomes excessively hot. Once it has cooled, check for visible lint around the machine and look for a crushed or sharply bent section of accessible hose. If the heat persists or the dryer shuts off, book an inspection rather than restarting it to finish the load.
4. You notice a burning smell from the dryer
A burning smell from a dryer is a warning to take seriously. Lint is combustible, and restricted airflow can contribute to overheating. However, an appliance fault (such as an issue with an electrical component, belt or motor) can also cause an unusual smell.
What to do: Turn the dryer off and do not use it again until the cause has been checked. If you can safely unplug it, do so. Do not run another cycle to see whether the smell returns. If you see smoke or fire, leave the area and contact emergency services.
The U.S. Consumer Product Safety Commission explains that lint in a dryer or exhaust duct can block airflow and lead to excessive heat. See its dryer safety information. If you smell burning, an inspection should consider both the vent and the appliance.
5. The outdoor vent hood feels unusually hot or barely releases air
The exterior vent hood is where the dryer exhaust leaves your home. During operation, it should allow air to escape. Weak airflow, a flap that barely opens or a hood that seems unusually hot can point to an obstruction or restricted duct.
What to check first: From a safe position, observe the outlet while the dryer is running only if there are no burning smells or signs of overheating. Check for visible leaves, snow or other debris around the hood, and make sure its flap is not stuck. Keep clear of moving parts and do not climb onto a roof or use an unsafe ladder. If airflow remains weak, arrange professional cleaning.
6. Lint is gathering around the vent opening or behind the dryer
Lint around the exterior vent opening, dryer connection or floor behind the appliance may mean fibres are escaping or collecting where airflow is reduced. It can also point to a loose, damaged or disconnected section of duct.
What to do: Remove visible lint only from areas you can reach safely. Don’t push it deeper into the duct, and don’t run the dryer with its exhaust hose disconnected. If you see a damaged connection, persistent lint deposits or buildup beyond the outlet, have the system inspected. Professional dryer lint cleaning and vent service can address accessible ductwork and help identify problems that cleaning alone will not fix.
7. The dryer stops mid-cycle or your energy bills rise
A dryer that repeatedly shuts off may be responding to overheating, but a sensor or another appliance fault could also be responsible. Higher energy use can have many causes. If your dryer takes too long to dry, longer cycles may contribute to increased consumption, but a change in your bill by itself does not confirm a clogged vent.
What to do: Note when the dryer stops and whether the issue occurs with different loads. Clean the lint screen and check for an obvious kink in the accessible hose. If the dryer keeps shutting off, runs longer than usual or the change in energy use coincides with poor drying, arrange an inspection instead of continuing to run extra cycles.
A safe first check, and when to call a professional
If there is no burning smell, smoke or unusual heat, start with a few basic checks:
- Clean the lint screen and remove visible lint from its housing.
- Check the accessible hose for crushing, sharp bends or a loose connection.
- Look for visible debris around the exterior vent hood.
- Follow your dryer’s manual and do not operate the machine with its exhaust duct disconnected.
These checks can help with simple, visible issues, but they cannot confirm that a long or concealed vent is clear. A brush or vacuum may not reach the full duct, and forcing tools into it can damage the vent or push debris farther inside. Our guide to cleaning a dryer vent safely and knowing when to call a professional explains where DIY maintenance should stop.
At Dryer Vent Doctor, we inspect accessible parts of the dryer and vent, remove lint and debris with specialized rotating brushes and vacuum equipment, and measure airflow to help assess the system. If we find damaged ductwork or another issue that cleaning will not resolve, we explain the findings and discuss practical next steps. Learn more about our dryer vent cleaning service.
For more on maintenance and warning signs, read our ultimate guide to dryer vent cleaning, professional cleaning overview and article on why dryer performance can change. If you’re comparing service options, our 2026 pricing guide outlines common cost factors.
Dryer vent cleaning in Vancouver, Calgary and Toronto
We help homeowners and property managers address dryer vent concerns in Vancouver, Calgary and Toronto. If you’ve noticed one or more of these warning signs, request an estimate or book an appointment online. Our team can inspect the vent, explain what we find and recommend the appropriate next step.
