Dryer Vent Cleaning in San Rafael, CA
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Step 1 of 3: Equipment
Cold nights turn dryer lint into a solid clog
Every load sends warm, damp air down the vent and out. On a cold night, that air cools fast against the vent walls before it makes it outside. The moisture in it beads up, and lint sticks to the wet surface instead of blowing through.
Winter nights here average 43°F, cold enough for that to happen most times the dryer runs. Layer by layer, the vent narrows. A narrow vent pushes moist air back toward the dryer instead of out of the house, and it makes the dryer work harder to push air through at all.
- 43°F
- the average winter night, and cold vents catch damp lint
- 9 months
- October through June, the vent stays cold
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NOAA nClimDiv, 1991–2020 normals
- How often should a dryer vent be cleaned?
- Most manufacturers call for cleaning the vent once a year. A contractor can tell you if yours needs it sooner once they see how much lint has built up and how the duct is routed. Lint collects along the whole length of the duct, not just in the lint trap, and that buildup is what leads to long dry times or worse.
- Can I clean my dryer vent myself?
- You can clean part of it, but not all of it. A vent brush kit reaches the lint near the dryer and near the outside hood, but the duct often runs through a wall or turns corners, and lint gathers at every bend. A contractor uses rods and a shop vac built to reach the full length of the duct, including the parts a homeowner's kit cannot get to.
- What are the signs of a clogged dryer vent?
- Clothes that need a second cycle to dry, a dryer that runs hotter than usual, or a burnt smell partway through a load all point to a blocked vent. Check the outside vent hood while the dryer is running. Little or no airflow there, or a flap that barely opens, means lint has built up somewhere along the duct.