HVAC Maintenance: What Every Texas Homeowner Needs to Know

In most of the country, HVAC failure is an inconvenience. In Texas, a broken air conditioner in August is a health emergency. With daytime temperatures regularly exceeding 100°F in Dallas, Houston, and San Antonio, a properly maintained HVAC system is not a luxury — it is a necessity. The good news is that the vast majority of system failures are preventable with simple, regular maintenance.

The single most important thing you can do is change your air filter on schedule. A clogged filter forces your system to work harder, increases energy consumption, reduces airflow, and accelerates wear on the blower motor and evaporator coil. In Texas, where systems run eight to ten months per year, filters should be changed every 30 to 60 days — not the 90-day schedule printed on most filter packaging, which is calibrated for more temperate climates.

Each spring, before the summer cooling season begins, have a licensed HVAC technician perform a full system inspection. This visit should include checking refrigerant levels, cleaning the evaporator and condenser coils, inspecting the drain lines (algae growth in humid Texas summers frequently clogs drain pans and triggers shutoffs), lubricating moving parts, and testing the electrical components and thermostat calibration. This annual visit typically costs $80 to $150 and can catch a failing capacitor or low refrigerant charge before it becomes a $1,500 emergency on a July weekend.

Your outdoor condenser unit needs clear space to breathe. Keep at least two feet of clearance on all sides, trim back any vegetation that crowds the unit, and gently rinse the coil fins with a garden hose each season to remove accumulated debris. Never use a pressure washer — the fins are delicate aluminum and will bend under high pressure. Bent fins reduce efficiency and can eventually cause the unit to overheat.

When it is time for a replacement — most Texas systems last 12 to 15 years given the heavy use — look for SEER2 ratings of 15 or higher, which qualify for federal tax credits and will deliver meaningful energy savings over the system's life. A NATE-certified technician is your best guide through the selection process, as they can perform a Manual J load calculation to right-size the equipment for your home — preventing the all-too-common mistake of installing an oversized unit that short-cycles and fails to dehumidify properly.