The lint screen is not the whole vent system
Cleaning the lint screen is basic dryer care. Dryer vent cleaning is a different job. The vent is the exhaust path from the back of the dryer through the wall, crawlspace, attic, or roof area to the outside termination. Lint and dust can collect along that route even when the screen looks clean after every load.
That is why dryer vent cleaning is separate from appliance repair and separate from whole-house HVAC duct cleaning. The work involves a specific exhaust duct, its bends and connections, the exterior hood, and the airflow path. A person who repairs the dryer may not have the equipment or access needed to clean a long or roof-terminated vent. A duct cleaner may not diagnose a dryer heating or motor problem.
The Consumer Product Safety Commission’s dryer safety guidance connects lint buildup in the dryer or exhaust duct with restricted airflow and excessive heat. It recommends cleaning the lint screen and the vent and exhaust duct periodically.
Signs that airflow may be restricted
Watch for a combination of symptoms, not one isolated clue:
- clothes take longer to dry than they used to;
- clothes remain damp after a normal cycle;
- the laundry room becomes unusually hot;
- the outside flap opens weakly or not at all while the dryer runs;
- lint appears around the exterior termination or behind the dryer;
- the dryer shuts down on a thermal limit or shows a heat-related code;
- a burning smell appears.
Long drying time can also come from a failed heating element, gas ignition problem, thermostat, moisture sensor, drum seal, or motor. Vent cleaning is not a universal answer. If airflow at the outside is strong but the dryer still will not heat, the appliance itself needs diagnosis.
Why the route matters
A short, straight duct is easier to inspect and clean than a long route with multiple turns. A laundry room in the middle of a house may vent through a wall, attic, or roof. A crushed connector behind the dryer can restrict airflow before lint even reaches the main duct.
The material matters too. The CPSC recommends replacing plastic or foil accordion-style ducting with rigid or corrugated semi-rigid metal ducting where the dryer manufacturer specifies it. Flexible material can trap lint and is easier to kink or crush.
Do not assume the shortest visible path is the full path. Ask to see the route or the exterior termination. If the duct disappears into a wall or ceiling, the technician should explain how it will be inspected and how the risk of damage will be managed.
What a proper cleaning visit should cover
The exact method depends on the route, but a clear scope usually includes:
Inspection
The technician identifies the dryer type, the visible connector, the exhaust route, the exterior hood, and access points. They should look for crushed ducting, disconnected joints, damaged screens, blocked flaps, and lint around the termination.
Cleaning the duct
The technician disconnects the dryer safely and uses equipment suited to the duct length and construction. The goal is to remove lint and debris without pushing a blockage deeper into the route or damaging joints. The outside termination should be checked after cleaning.
Airflow check
The technician should explain how airflow was checked before and after the work. A clean duct can still perform poorly if the route is too long for the dryer, the termination is damaged, or the connector is crushed.
Reconnection and test
The dryer should be reconnected without a crushed hose. The technician should confirm that the exhaust is leaving the building and that the exterior flap moves. For a gas dryer, work around the gas connector should be handled by someone qualified for that task. Do not move or disconnect a gas appliance casually.
What homeowners can do safely
Clean the lint screen before or after every load. Keep the area behind the dryer clear enough to inspect the connector. When the dryer is running, look outside for airflow and make sure the flap is not stuck. Remove lint from the visible screen housing according to the manual.
If you can safely reach the outside hood from ground level, remove visible lint from the hood without reaching deep into the duct. Do not climb onto a roof or open a wall for a routine check. Do not put a hand into the dryer cabinet or use a tool near a powered drum.
Stop using the dryer and arrange a professional inspection if you smell burning, see smoke, find a crushed or disconnected duct, or discover that the outside termination has no airflow during a cycle. If there is a fire, leave the home and contact emergency services.
Typical Bay Area pricing in 2026
A typical Bay Area range for dryer vent cleaning is roughly $150 to $575. That is a planning range, not a fixed price. The low end is more likely for a short, accessible run. A long route, several bends, an attic or roof termination, heavy blockage, difficult access, or duct repair can move the price up.
Ask whether the price includes inspection, cleaning from both ends, exterior hood access, airflow testing, replacement of a damaged connector, and cleanup. A low price for brushing the first visible section is not the same service as cleaning and checking the complete exhaust route.
There is no single calendar interval that fits every home. Use the dryer manual, the amount of laundry, the route length, and the symptoms as a guide. A household that runs several loads a day and has a long hidden route may need attention sooner than a lightly used dryer with a short exit.
Keep the services separate
If the dryer is not heating, the vent may be part of the problem, but it may also have a failed heating, gas, control, or sensor component. If the duct is clear but the dryer trips a breaker or makes a mechanical noise, call an appliance technician. If the dryer works but the exhaust path is restricted, call a vent-cleaning specialist who can reach the entire route.
The right question is, “Which part of the system is being inspected?” A professional should answer that before quoting the work.
FAQ
Is cleaning the lint screen enough?
No. The lint screen protects the dryer, but lint can also collect in the exhaust connector, duct, bends, and exterior hood. Clean the screen every load and inspect the full vent path when symptoms or access conditions call for it.
How often should a dryer vent be cleaned?
Use the manufacturer’s guidance and consider how much the dryer runs, how long the route is, how many bends it has, and whether airflow has changed. Longer drying time and weak exterior airflow are stronger signals than a calendar alone.
Does dryer vent cleaning fix a dryer that does not heat?
It can help if restricted airflow is causing overheating or poor drying, but it cannot fix a failed heater, igniter, motor, sensor, or control. If the vent is clear and the dryer still has no heat, the appliance needs a separate diagnosis.
Can I clean a roof-terminated vent myself?
A homeowner can inspect accessible areas, but roof access and a long hidden route add fall and equipment risks. Use a qualified service provider when the exterior termination is unsafe or the full duct cannot be reached from the laundry area.