Air Conditioning Repair and Maintenance for the Medina, Atascosa County and Greater San Antonio, TX Area

Sub Zero Air Conditioning & Heating accepts most HVAC system manufacturer warranties for home heating and cooling equipment repairs. We service most major brands of heating and cooling systems, and all parts and labor are 100% guaranteed. With over 50 years of combined industry experience, there’s very little we haven’t seen. Annual maintenance contracts are available.

Please don’t hesitate to call or contact us to schedule preventative maintenance for your heating and cooling system. Bookmark our website and save our phone number for fast, reliable HVAC repair and maintenance service.

What Is Included in a Scheduled Heating & Cooling System Inspection?

  • Inspect ducts, filters, blower, and indoor coil for dirt and obstructions
  • Diagnose and seal duct leakage
  • Check for refrigerant leaks
  • Inspect electrical terminals; clean and tighten connections; apply a non-conductive coating
  • Verify correct refrigerant charge through precise measurements
  • Lubricate motors and inspect belts for wear
  • Verify adequate airflow through measurements
  • Verify proper electric control operation (ensuring heating is locked out when the thermostat is set for cooling)
Air Conditioner — San Antonio, TX — Sub Zero Air Conditioning & Heating

What is Included in a Scheduled Cooling and Heating System Inspection?

  • Inspect ducts, filters, blower, and indoor coil for dirt and obstructions
  • Diagnose and seal duct leakage
  • Check for refrigerant leaks
  • Inspect electric terminals, clean/tighten connections; apply non-conductive coating
  • Verify correct refrigerant charge by measurement
  • Lubricate motors/inspect belts for wear
  • Verify adequate airflow by measurement
  • Verify correct electric control - heating is locked when the thermostat set for cooling
Technician is Checking Air Conditioner — San Antonio, TX — Sub Zero Air Conditioning & Heating

Why Schedule Preventative Maintenance for Your Heating & Cooling System?

Sub Zero Air Conditioning & Heating will thoroughly inspect your existing HVAC system to assess its current condition. Our technicians will review their findings with you and discuss available options, including comparing repair costs versus the long-term benefits of installing a new heating or cooling system.

Please call or contact us today to schedule a service call or request a free estimate on replacement systems.
Local residential and commercial A/C & heating service and installation company serving customers in cities, towns, and suburbs in Greater San Antonio, Texas area.
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