Weak airflow coming from your air conditioning supply vents can be triggered by several common mechanical, electrical, and maintenance-related restrictions within your HVAC distribution network. The single most frequent cause is a severely neglected, dirty air filter packed with dust and pet hair that chokes the blower fan and spikes static pressure. Another major culprit is a completely frozen indoor evaporator coil that blocks airflow entirely and halts thermal exchange due to low refrigerant or restricted air intake. Additionally, crushed flexible duct runs in the attic, closed balancing dampers, disconnected trunk lines, or a failing blower motor capacitor can severely reduce fan output. You can troubleshoot by inspecting filters and checking for ice. You can verify the root cause when diagnostic checks confirm that resolving filter clogs, thawing coils, or repairing ducts restores normal airflow.
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