AC (indoor) weak airflow?

A clogged air filter is the most common cause of reduced airflow, physically blocking air from reaching the fan and coil.

Likely causes · most likely first

Air Filter

Easy DIY Part: $10–$25
Cross Flow Fan

Hard DIY Part: $30–$70

Heavy dust accumulation on the cross-flow fan blades reduces the effective blade area and air-moving capacity.
Fan Motor

Hard DIY Part: $40–$90

A failing fan motor running below rated speed reduces the static pressure and volume of air it can move.
Horizontal Discharge Grille

Easy DIY Part: $15–$40

A misaligned or broken horizontal grille partially blocks the discharge opening, restricting total airflow out of the unit.
Air Outlet Stabilizer

Easy DIY Part: $10–$30

A dislodged outlet stabilizer can collapse into the airstream and obstruct airflow from the cross-flow fan.

See the faulty part in 3D.

Tap a highlighted part to see exactly why it fails, how to verify it's the problem, and how to replace it.