Why it matters to you
The blower runs every time the system heats, cools or circulates air, which in Greater Houston means most of the year. A weak or failing blower motor cuts airflow, which can freeze the evaporator coil and leave rooms warm even while the outdoor unit runs.
Practical guidance
Signs of trouble include little or no air at the vents, a humming or squealing indoor unit, or a burning smell; turn the system off and call for service. Ask the technician to measure static pressure too, since restrictive ducts and filters make a blower motor work harder.