Winterizing Your HVAC System in San Antonio – Protect Your Heating Equipment Before Cold Snaps Hit

Replace the air filter and clear debris from around the outdoor unit. Test your heating system by switching the thermostat to heat mode and running it for 10 minutes. Listen for unusual noises or smells that indicate problems. Check weatherstripping around doors and windows to prevent heat loss. In San Antonio, where winters bring unpredictable freezes, inspect insulation in attics and crawlspaces. Schedule a professional inspection to clean burners, check gas pressure, and test safety controls. A technician will measure carbon monoxide levels and verify the heat exchanger is intact to prevent dangerous leaks.

No, 72 degrees is not too high for winter heating if it fits your comfort and budget. The Department of Energy recommends 68 degrees when home and lower when sleeping or away to save energy. In San Antonio's mild winters, you may not need constant heating. Each degree above 68 increases energy costs by about 3 percent. If 72 feels comfortable and your bills are manageable, maintain that setting. Consider a programmable thermostat to automatically lower temperatures during work hours or overnight, balancing comfort with efficiency without constant manual adjustments.

The Energy Efficient Home Improvement Credit for 2025 offers up to $2000 for qualifying HVAC equipment, including heat pumps, central air conditioners, and gas furnaces that meet efficiency standards. Heat pumps may qualify for higher credits. The system must meet ENERGY STAR criteria, and installation costs are excluded. Requirements include a SEER2 rating of 16 or higher for air conditioners and an AFUE of 95 or higher for gas furnaces. Check IRS guidelines or consult a tax professional for specific eligibility. Combining upgrades like insulation can maximize your total credit under the program.

The average HVAC system lasts 15 to 20 years with proper maintenance. In San Antonio, high cooling demand and humidity can shorten lifespan closer to 12 to 15 years. Factors affecting longevity include installation quality, regular filter changes, and annual professional tune-ups. Systems that cycle frequently or run undersized for the home wear out faster. Heat pumps typically last 10 to 15 years due to year-round operation. Neglected maintenance accelerates deterioration. Replacing your system proactively before failure prevents emergency breakdowns during extreme weather and allows you to choose energy-efficient models.

Keeping your AC at 72 does not inherently save money. Savings depend on the outdoor temperature and your system's efficiency. In San Antonio's scorching summers, setting the thermostat higher, like 76 to 78 degrees, reduces runtime and lowers bills. Each degree below 78 increases energy use by about 3 to 5 percent. If 72 is significantly lower than outdoor temps, your system runs constantly. Use ceiling fans to improve comfort at higher settings. Programmable thermostats let you raise temperatures when away, cutting costs without sacrificing comfort when home.

When outdoor temps hit 100 degrees, your home should cool to about 75 to 80 degrees, depending on your system's capacity. Most air conditioners can lower indoor temps 15 to 20 degrees below outdoor conditions. In San Antonio's extreme heat, expecting 70 degrees indoors strains your system and spikes energy bills. Ensure your home has adequate insulation, seal air leaks, and use blinds to block afternoon sun. If your system struggles to maintain 80 degrees, you may have refrigerant leaks, dirty coils, or undersized equipment requiring professional evaluation.