HVAC Services San Marcos TX | Call Dussetschleger's

An improperly sized system is a common issue we fix. An oversized unit will short-cycle, turning on and off too frequently, which hikes up your energy bills, fails to dehumidify properly, and wears out components quickly. An undersized unit runs constantly, struggling to reach your desired temperature and driving up costs. We perform precise Manual J load calculations to determine the exact capacity your home needs for maximum efficiency and comfort.

A frozen evaporator coil is often a symptom of restricted airflow or low refrigerant. In San Marcos, clogged air filters, dirty coils, or failing blower motors are frequent culprits. Our technicians perform a comprehensive diagnosis to pinpoint the exact cause. We'll then professionally clean the system, repair any leaks and recharge refrigerant to proper levels, or fix the airflow issue to prevent the freeze-up from recurring and protect your compressor.

Our diagnostic service is a thorough check-up for your system. We test refrigerant pressure and levels, inspect electrical components, measure airflow at the vents, examine the ductwork for leaks or restrictions, and assess the thermostat's calibration. This holistic approach allows us to identify interconnected problems—like how dirty filters lead to coil freeze-ups—and provide a complete repair plan to restore reliable, energy-efficient comfort to your home.