Blower motor replacement cost cannot be reduced to one reliable national price. The useful comparison is the written scope: diagnostic work, exact equipment or component identity, access, compatible parts, labor, refrigerant handling when applicable, electrical or duct corrections, permits, commissioning, warranty terms and disposal. A low headline figure and a complete installed scope are not the same product.
Low airflow or a silent fan may involve the motor, wheel, capacitor, control module, wiring, filter, or duct system rather than one assumed part. A technician can test the motor and controls, inspect the blower wheel and housing, measure airflow-related conditions, and identify the cause of excessive load. Ask whether the estimate covers the correct motor or module, programming where required, wheel service, access labor, electrical correction, final airflow checks, and warranty. Cabinet location, equipment generation, matching-part supply, indoor air conditions, and seasonal service demand can affect the practical repair scope. Note airflow strength, fan noises, intermittent operation, odors, and which heating or cooling modes are affected, then turn the system off if overheating or burning is suspected.