Dryer Vent Hose Replacement in San Diego, CA

Why does the hose behind my dryer keep crushing?

Usually because the dryer sits too close to the wall. That last stretch is transition duct, not duct. It is the only piece allowed to be flexible. Push a dryer back into a shallow garage alcove and foil flex folds flat behind the cabinet. Airflow drops. Lint piles up in the fold. The machine runs hot and slow. Thin white vinyl hose is worse and should come out on sight.

Replacement means semi-rigid aluminum or a rigid periscope, clamped at both ends. No sheet metal screws into the airstream. Screw tips catch lint. Foil tape, not duct tape, where a seal is needed. Transition duct cannot be concealed inside a wall or run through a floor. If the wall stub is buried behind drywall, the hose stops there and the problem moves inside.

Clearance drives the choice. In narrow garage alcoves and condo closet runs that tie into a chase, a recessed dryer vent box or a periscope buys back inches so the appliance sits flat.

New hose on a blocked main run solves nothing. Roof-jack elbows on upstairs laundries pack with cemented lint. We check the full path before swapping the short piece.