What Causes Weak Airflow?
Weak airflow from the vents makes the home feel warm and forces the AC to run longer. The cause can be in the filter, the ducts, or the blower.
Common Causes
- A dirty air filter.
- Blocked or closed supply vents.
- Leaky or crushed ductwork.
- A failing blower motor.
- A dirty indoor coil.
What to Check
Replace the filter and make sure all supply vents are open. If airflow is still weak, the cause may be in the ducts or blower. See weak airflow and airflow problems.
FAQs
What causes weak airflow from AC vents?
A dirty filter, closed vents, leaky ducts, or a weak blower motor are common causes.
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