Maintenance in San Marcos, TX. Free, no-pressure estimates.
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Covering San Marcos, TX & the surrounding area.
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When a homeowner calls about maintenance, they often notice their system is running louder, struggling to keep the house comfortable, or their energy bill has crept up. They know something is off but aren't sure what. Regular maintenance addresses that uncertainty by giving the system a thorough check before a small issue becomes a breakdown.
Our crew arrives with a full tool kit: multimeter, manifold gauges, coil cleaner, shop vac, and lubricant. We start by shutting off power, then clean the condenser coils and evaporator. We check refrigerant pressures with gauges, measure airflow across the evaporator, inspect the heat exchanger for cracks, and lubricate all motors. We test the thermostat calibration and safety controls.
The time and cost of a maintenance visit depend on system type—a heat pump takes longer than a straight AC—and how many units are on site. Access matters: a unit tucked behind bushes or in a tight crawl space adds time. Condition also plays a role; a heavily clogged coil or dirty blower wheel requires extra cleaning. System age can affect how easily components come apart.
On the day, we lay down drop cloths around indoor equipment and protect flooring. After the work, we wipe down the unit, vacuum any debris, and pack up all tools and materials. You do not need to be home the whole time, but we need clear access to both indoor and outdoor units. Afterwards, we leave a written report of system condition and any recommended follow-up.
A cracked heat exchanger can leak carbon monoxide into the home. We inspect it visually and with a mirror during every maintenance visit to catch this hazard early.
We measure superheat and subcooling with manifold gauges to verify the refrigerant charge is correct. Wrong charge reduces efficiency and can damage the compressor.
We turn off power at the disconnect and thermostat to work safely. This prevents accidental startup while we clean and inspect components.
We clean condenser coils, evaporator coils, and blower assembly. We check the drain pan and line for clogs, and inspect the heat exchanger for cracks.
We measure refrigerant pressures, airflow, and temperature drop. We lubricate motors, tighten electrical connections, and verify thermostat operation.
We restore power, run the system through a full cycle, and check for unusual noises or vibrations. We leave a written summary of findings and any recommendations.

A tiny refrigerant leak or a dirty coil makes your system work harder. Finding and fixing those early keeps the equipment running efficiently and avoids surprise breakdowns.
Dust and grime on coils and blowers block airflow, making the system run longer. Our cleaning restores proper airflow and helps the system hit its rated efficiency.
A cracked heat exchanger or loose electrical connection is a real danger. We test every safety control and inspect for hazards so your home stays safe year-round.
Call us or fill out the form below and we will get back to you quickly. We offer free estimates on all new installations and major repairs.