Furnace & Air Conditioning Repair in San Marcos, TX
Is your central furnace blowing cold air or your air conditioner struggling to keep up in San Marcos, Texas? Our licensed local HVAC technicians cover all 2 zip codes in San Marcos (78666, 78667) for 24/7 furnace repair, furnace replacement, furnace cleaning, and central AC service.
- ✓2 covered zip codes in San Marcos
- ✓Licensed & insured Texas HVAC technicians
- ✓Central gas/electric furnaces & split AC systems
- ✓Upfront written quote before any work begins
Schedule a Technician in San Marcos
Have your San Marcos zip code (78666) ready and describe what your heating or cooling system is doing.
Call (855) 734-0279We service central forced-air gas and electric furnaces, central air conditioning split systems, and residential ducted heating and cooling units. We do not service portable window units or ductless mini-split systems.
Central Heating & Air Conditioning Service in San Marcos, Texas
Homeowners in San Marcos, TX deal with Texas's subtropical humid to semi-arid steppe weather pattern: months of 100-degree summer cooling loads followed by sudden winter blue northers and hard freezes. Typical winter lows drop into the 20s in North Texas and Panhandle to 40s in South Texas, while summer afternoon highs reach the 95 to over 105 degrees.
Most homes across San Marcos (78666, 78667) use natural gas and central electric heat and rely on high-seer2 central split-system air conditioners and forced-air gas or electric furnaces. When a central furnace ignitor cracks on a freezing night or an outdoor AC capacitor fails during a summer heatwave, waiting days for an appointment is not an option. Our local dispatch line connects your San Marcos address with a licensed technician who carries standard diagnostic instruments and replacement parts on the truck.
What Homeowners in San Marcos, TX Call About Most
- •Failed AC dual-run capacitors, burnt compressor terminals, and dirty condenser coils from marathon summer cooling
- •Clogged attic AC condensate drain pans and float switch shutoffs
- •Attic gas furnaces failing to ignite during sudden winter freezes due to dusty burners or bad ignitors
Need same-day furnace or AC service in San Marcos?
Call 24/7 Dispatch: (855) 734-0279 →6 Core HVAC Services Available in San Marcos, TX
We specialize strictly in central ducted furnaces and central air conditioning systems in San Marcos. Every service below is backed by an upfront written quote before work begins.
Furnace Repair
Fast troubleshooting and part replacement for gas, electric, and propane forced-air central furnaces that blow cold air, short-cycle, or fail to ignite.
Furnace Replacement
Complete removal of old or unsafe furnaces and professional installation of new 80% to 98% AFUE central gas and electric forced-air heating systems.
Furnace Cleaning
Thorough cleaning of gas burners, flame sensors, blower wheels, condensate traps, and heat exchangers to prevent winter no-heat lockouts.
Air Conditioning Repair
Same-day diagnostics and repair for central split-system air conditioners blowing warm air, freezing up, leaking water, or failing to start outside.
AC Replacement
Complete replacement of old, leaking, or dead central air conditioners with new SEER2-compliant outdoor condensers and matched indoor evaporator coils.
Air Conditioning Cleaning
Professional cleaning of outdoor AC condenser coils, indoor evaporator coils, condensate drain lines, and blower assemblies to restore cold airflow and prevent breakdowns.
Furnace Replacement in San Marcos, TX
Furnace replacement is the complete change-out of an aging, inefficient, or red-tagged central forced-air furnace with a new, code-compliant heating unit. Unlike a quick part swap, a replacement involves mechanical sheet-metal transition work, gas line sediment trap verification, electrical wiring, flue exhaust engineering, and airflow commissioning.
What Our San Marcos Heating Visit Includes:
- ✓Safe disconnection, removal, and disposal of the old central furnace
- ✓BTU heating load and indoor airflow sizing check
- ✓Sheet-metal supply and return plenum transition sealing
- ✓Code-compliant gas shutoff valve, flex connector, and sediment trap check
- ✓Flue exhaust venting (B-vent metal or two-pipe PVC for condensing units)
- ✓Condensate drain line and neutralizer/pump setup (for 90%+ AFUE models)
Air Conditioning Cleaning in San Marcos, TX
Air conditioning cleaning is a comprehensive mechanical cleaning and performance tune-up for ducted central split-system and packaged air conditioners. Outdoor condensing units act like giant vacuum cleaners in your yard, pulling thousands of cubic feet of air per minute through tightly spaced aluminum fins that trap dirt, pollen, mulch dust, and lawn debris.
What Our San Marcos Cooling Visit Includes:
- ✓Outdoor condenser cabinet debris removal and coil washing
- ✓Condenser fin inspection and airflow check
- ✓Accessible indoor evaporator coil surface inspection and cleaning
- ✓Primary condensate drain pan and PVC drain line flush
- ✓Condensate overflow safety float switch test
- ✓Dual-run capacitor microfarad test and contactor inspection
Zip Codes We Cover in San Marcos, TX (2)
Select your 5-digit San Marcos zip code below to view zip-specific service dispatch details, or mention your zip code when calling (855) 734-0279.
Service Area Map for San Marcos, TX
Our technicians dispatch across San Marcos, TX (2 covered zip codes) for central furnace repair, furnace replacement, furnace cleaning, and central air conditioning service.
Nearby & Related Service Areas in Texas
Our Texas dispatch network also covers these neighboring communities and metro hubs.
Major Texas Metro Hubs:
Frequently Asked Questions About HVAC Service in San Marcos, TX
Which zip codes in San Marcos, TX do your HVAC technicians cover?
We cover 2 zip codes in San Marcos, Texas, including 78666, 78667. Call (855) 734-0279 and give your zip code for immediate scheduling.
What central heating and cooling services do you provide in San Marcos?
Our licensed technicians in San Marcos, TX perform six core residential services: Furnace Repair, Furnace Replacement, Furnace Cleaning, Air Conditioning Repair, AC Replacement, and Air Conditioning Cleaning.
Do you repair or install ductless mini-splits in San Marcos?
No. In San Marcos, TX, we work strictly on residential central ducted furnaces (natural gas, propane, and electric) and central split-system or packaged air conditioners. We do not service window AC units or ductless mini-splits.
Can I get same-day emergency furnace repair or AC repair in San Marcos, TX?
Yes. Our dispatch desk at (855) 734-0279 is open 24 hours a day, 7 days a week. When your central furnace quits on a freezing night or your AC fails in summer heat, we check open technician slots across San Marcos for same-day service.
How does Texas weather impact furnaces and air conditioners in San Marcos?
San Marcos experiences Texas's subtropical humid to semi-arid steppe climate, with winter lows around 20s in North Texas and Panhandle to 40s in South Texas and summer highs in the 95 to over 105 degrees. Pre-winter furnace cleaning in October and annual AC coil cleaning help prevent peak-season breakdowns.
Do I get a written price quote before work starts on my San Marcos home?
Yes. The technician performs a complete diagnostic on your furnace or central air conditioner, explains what failed, and gives you an upfront written quote before starting any repair or replacement.