Steps to Prep Your Furnace for the Houston Winter

When that first chilly front blows through Houston, most homeowners do the same thing—flip their thermostat from “cool” to “heat” and hope for the best. But before you fire up your furnace for the first time this season, it’s worth giving your system a quick check.

Dust, debris, or even a small leak can create fire hazards, carbon monoxide risks, or costly repairs. A few simple steps can help ensure your system runs safely and efficiently all winter long.

1. Check and Replace Your Air Filter

A clean air filter makes all the difference in how well your system performs. Clogged filters restrict airflow, forcing your furnace to work harder than necessary—and that means higher energy bills and extra wear on the system.

Replace your filter before winter begins and mark your calendar to check it every month.

2. Confirm the Power and Thermostat Settings

Before assuming your system isn’t working, check the basics:

• Make sure the furnace power switch is turned on.

• Verify your thermostat is set to “heat” and adjusted to your preferred temperature.

• Ideally, your thermostat should be set between 68°F and 72°F for comfort and efficiency.

If you’ve recently installed a new thermostat or made electrical updates, double-check that your wiring is intact and settings are properly synced.

3. Inspect the Pilot Light or Ignition System

If you have a gas furnace, ensure the pilot light is burning steadily and has a strong blue flame. Flickering or yellow flames could signal dirt buildup or poor combustion—both safety concerns that require attention.

If your system uses electronic ignition, confirm it starts cleanly and without hesitation.

If you have a gas furnace, make sure the pilot light is lit.

4. Test the System and Listen for Trouble

Once everything looks good, turn your furnace on and observe how it runs:

• Is the air warm and consistent?

• Do you hear unusual noises like rattling, banging, or whistling?

• Does the system cycle on and off properly?

  
  

Unusual sounds or weak airflow could indicate dirty components, ductwork issues, or a failing part. Catching these early prevents bigger repairs later.

5. Troubleshoot Common Issues

If something seems off, here are a few quick checks before calling in the pros:

• Circuit Breaker: Make sure the furnace breaker hasn’t tripped.

• Vents and Ducts: Confirm nothing is blocking airflow.

• Flame Sensor: If your furnace shuts off soon after starting, the sensor may need cleaning.

For more complex issues—like ignition failure, gas valve problems, or airflow imbalance—it’s best to bring in a certified HVAC technician.

6. Schedule a Professional Furnace Tune-Up

Even if your system seems to be running fine, professional maintenance helps catch hidden issues and keep your home safe. A technician will inspect key components like:

• Heat exchanger (for cracks or leaks)

• Ignition system and gas pressure

• Ductwork and airflow

• Carbon monoxide levels

Regular tune-ups can extend your system’s lifespan, improve efficiency, and ensure your family stays warm when Houston temperatures dip.

Remember...

Don’t get caught in a Texas cold snap with no heat! A few minutes of prep now can save you from costly repairs or chilly nights later.

If you’re unsure about any of these steps—or prefer to have a professional handle your winter HVAC prep—Velocity Air A/C & Heating is here to help.

Final Thoughts

At Velocity Air A/C & Heating, if you are having trouble with your HVAC system, our team is here to help. Whether you need routine maintenance, quick repairs, or a full system replacement, we will keep your HVAC running efficiently and safely, so your home stays comfortable no matter the Texas weather. We provide expert Houston HVAC repair services, Houston HVAC installation services, and Houston HVAC preventive maintenance to keep your system running smoothly and efficiently all season long. Velocity Air A/C & Heating is proud to provide Houston HVAC services, including maintenance, emergency repair, and installation, to the Greater Houston Area.