How to Prepare Your HVAC System for Winter in Texas

Texas may be known for its blazing summers, but when winter rolls in, the cold can still catch many homeowners off guard—especially during those sudden cold snaps. If your HVAC system isn’t ready, you could be left with chilly rooms, rising energy bills, or even emergency repair costs.

At Tarrant Mechanical, we help DFW residents avoid winter discomfort with proactive seasonal service. In this guide, we’ll walk you through how to prepare your HVAC system for winter in Texas, step-by-step.

1. Replace or Clean Your Air Filter

A clean air filter keeps your system running efficiently and prevents dust from circulating indoors. In winter, your heater runs more frequently—so a clogged filter can cause reduced airflow and higher energy use.

Tip:
Check your filter before the season begins and replace it every 1–3 months, depending on your system and usage.

2. Test Your Thermostat Settings

Before the temperature drops, switch your thermostat from cooling to heating mode and test your settings. Make sure:

• The system kicks on properly
• It heats to the programmed temperature
• Your thermostat is reading the correct indoor temp

Bonus tip:
If you’re still using a manual thermostat, consider upgrading to a programmable or smart model for better energy savings and control.

3. Clear the Outdoor Unit

If you have a heat pump or dual system, your outdoor unit will still run during the winter. Make sure:

• Leaves, twigs, and debris are cleared from around the unit
• There’s at least 2–3 feet of clearance for proper airflow
• No water is pooling nearby, which could freeze and cause damage

Keeping the area around your unit clean helps it run efficiently and safely.

4. Check for Drafts and Seal Leaks

Your HVAC system works harder if your home is leaking warm air. Before winter hits, check:

• Windows and doors for drafts
• Attic access and vents
• Duct connections for leaks or gaps

Sealing leaks and improving insulation helps your system retain heat—reducing strain and lowering your utility bills.

5. Schedule a Professional HVAC Tune-Up

One of the best ways to prepare for winter is to have your system professionally inspected. At Tarrant Mechanical, our winter HVAC tune-ups include:

• System diagnostics and safety checks
• Burner and heat exchanger inspection (for furnaces)
• Thermostat calibration
• Electrical component testing
• Airflow evaluation and filter replacement
• Ductwork inspection and recommendations

Catching small issues now can prevent major breakdowns during a winter freeze.

6. Inspect Carbon Monoxide Detectors

If you heat your home with gas, it's essential to have functioning carbon monoxide (CO) detectors. CO leaks can be deadly—and they often happen when systems aren't maintained.

Tip:
Test detectors monthly and replace batteries before winter begins.

7. Know the Warning Signs of Heater Trouble

If you notice any of the following, your system may need service before winter:

• Strange odors when the heat kicks on
• Cold air coming from vents
• Unusual noises like banging or whistling
• Uneven heating in different rooms
• The system short cycles or won’t turn on

Don’t wait for a breakdown—call Tarrant Mechanical at the first sign of trouble.

Why Winter Prep Is So Important in Texas

While Texas winters aren’t always harsh, recent years have shown how unpredictable the weather can be. A properly prepared HVAC system can:

• Keep your home warm during surprise freezes
• Prevent frozen pipes and home damage
• Lower your winter energy bills
• Avoid costly emergency repairs when technicians are in high demand

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