How your system actually works.

Warm air is pulled out of your rooms through the ceiling return, cleaned by the filter, chilled across the evaporator coil in the attic, then pushed back down through insulated flex to every register. The condenser on the pad outside dumps that heat into the yard. Break any link and the whole loop suffers.

Warm air is pulled out of your rooms through the ceiling return, cleaned by the filter, chilled across the evaporator coil in the attic, then pushed back down through insulated flex to every register. The condenser on the pad outside dumps that heat into the yard. Break any link and the whole loop suffers.

The condenser releases the heat your system collected indoors. On a 103° afternoon it is working against air that is already hotter than the coil wants. We inspect the coil, fan motor, capacitor, contactor and refrigerant charge — in that order, because that is the order they fail here.

The condenser releases the heat your system collected indoors. On a 103° afternoon it is working against air that is already hotter than the coil wants. We inspect the coil, fan motor, capacitor, contactor and refrigerant charge — in that order, because that is the order they fail here.

In most San Antonio homes the unit lies on its side in the attic, over a secondary drain pan with a float switch. That pan is the only thing between a plugged drain line and your ceiling. We check the coil, blower, pan, float switch and both drain lines every visit.

In most San Antonio homes the unit lies on its side in the attic, over a secondary drain pan with a float switch. That pan is the only thing between a plugged drain line and your ceiling. We check the coil, blower, pan, float switch and both drain lines every visit.

The hallway ceiling grille is where the whole house breathes in. The filter behind it catches dust and cedar pollen before they reach the coil. Let it load up and airflow drops, the coil ices, and the unit runs longer for less cooling.

The hallway ceiling grille is where the whole house breathes in. The filter behind it catches dust and cedar pollen before they reach the coil. Let it load up and airflow drops, the coil ices, and the unit runs longer for less cooling.

R-8 flex runs from the trunk to a boot in every room. Every sag, crushed elbow and unsealed collar in that attic is cooling you paid for and never felt — a typical home loses 20–30% of it. We inspect, seal and balance the whole run.

R-8 flex runs from the trunk to a boot in every room. Every sag, crushed elbow and unsealed collar in that attic is cooling you paid for and never felt — a typical home loses 20–30% of it. We inspect, seal and balance the whole run.

Your system's brain, reading one spot in one hallway and deciding for the whole house. Placement and calibration matter as much as the brand. A properly configured smart thermostat saves 10–15%, and we install every major line.

Your system's brain, reading one spot in one hallway and deciding for the whole house. Placement and calibration matter as much as the brand. A properly configured smart thermostat saves 10–15%, and we install every major line.