In Houston's heat, an air conditioner that runs without actually cooling is an emergency. Work through these from cheapest and easiest up to the ones that need a licensed pro.
Replace the Air Filter
A clogged filter starves the system of airflow and can cause the coil to ice over.
Fix: Swap or rinse the filter monthly through the height of cooling season.
Clean the Coils
Grime-coated evaporator or condenser coils can't transfer heat the way they're supposed to.
Fix: Clear debris away from the outdoor unit and have the coils professionally cleaned once a year.
Low Refrigerant
A system that's low on refrigerant cools weakly and may hiss audibly or ice up.
Fix: Refrigerant work is regulated by law — a licensed technician has to locate the leak and recharge the system.
Not sure what's wrong? Book online — every visit includes a free diagnosis.