By Robert Patterson
The short answer: your AC doesn't "make cold" — it moves heat and moisture out of your house. Refrigerant absorbs heat indoors at the evaporator coil, carries it outside to the condenser, and dumps it there. On the Gulf Coast, pulling humidity out is half of what keeps you comfortable.
What are the main parts?
Four pieces do the work: the outdoor condenser and compressor, the indoor air handler with its evaporator coil, the refrigerant that cycles between them, and the ductwork that distributes the cooled, dried air. When one is undersized or dirty, the whole system struggles.
Why humidity matters as much as temperature
A house at 74° that's damp still feels sticky. A right-sized system runs longer, gentler cycles that wring out moisture — an oversized one blasts cold, satisfies the thermostat fast, and leaves the air clammy. That's why correct sizing beats "bigger is better," and why indoor air quality and cooling are one system.
Where it goes wrong
Low refrigerant from a slow leak, a dirty coil, a weak capacitor, or restricted airflow all make the system run constantly without truly cooling — see why your AC blows warm air and why it freezes up. Regular AC service catches these early.
Your next step
Understanding the system helps you spot trouble early and ask better questions. Keep yours healthy with the $159/yr maintenance plan, explore air conditioning services across our service areas, or dig into the Learning Center.