The single most common problem encountered by HVAC technicians servicing residential air conditioning systems is a dirty, clogged air filter. When homeowners neglect regular filter replacements, dust, pet dander, and debris accumulate rapidly, severely restricting airflow through the system. Restricted airflow forces the air conditioner to work harder to pull air across the evaporator coil, which can lead to frozen coils, reduced cooling efficiency, system overheating, and premature component failure. Other frequently reported AC problems include electrical component failures such as worn-out run capacitors or faulty contactors, as well as refrigerant leaks within sealed copper lines.
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