HVAC FAQs Dallas, TX
Straight answers to the questions Dallas homeowners ask us most.
How often should I change my air filter?
For standard 1-inch filters, every 1–3 months depending on usage, pets, and dust levels. In Dallas, where systems run hard in summer, check monthly and replace when visibly dirty. Thicker 4-inch filters can last 6–12 months.
When should I repair vs. replace my HVAC system?
A common rule: if the repair cost exceeds 50% of the system's remaining value, replacement usually makes more financial sense. Systems over 10–15 years old, breaking down repeatedly, or driving up energy bills are typically better candidates for replacement than repeated repair.
What does SEER rating mean?
SEER (Seasonal Energy Efficiency Ratio) measures how efficiently an AC system cools. Higher SEER = lower energy costs. In Texas, a minimum of SEER 15 is recommended. Modern high-efficiency systems run SEER 18–25+. The payback period on a higher-SEER system depends on your usage and current energy costs.
How long do HVAC systems last in the Texas heat?
In Dallas-Fort Worth, AC systems typically last 10–15 years with proper maintenance — shorter than the national average because they run harder and longer. Furnaces last longer, often 15–20 years. Regular maintenance significantly extends system life in extreme climates.
Why is my AC not cooling the house?
Common causes include a dirty air filter (restricts airflow), low refrigerant (usually means a leak), a frozen evaporator coil, a failing capacitor or compressor, or a thermostat issue. Start with the filter — if that's fine, call a technician. Don't run the system if you see ice forming on the unit.
What are the signs I need furnace repair or maintenance?
Short cycling (turns on and off frequently), unusual sounds (banging, squealing, rattling), uneven heating across rooms, higher-than-normal energy bills, yellow or orange pilot flame (should be blue), or a furnace over 15 years old with no recent service.
What causes poor indoor air quality?
Dirty ductwork, a clogged air filter, high humidity, inadequate ventilation, or an aging HVAC system that recirculates dust and allergens. If your home feels stuffy, you're sneezing more, or you see excess dust on surfaces, your HVAC system may be contributing to air quality issues.
What are the benefits of a maintenance membership?
Regular maintenance prevents up to 80% of common HVAC failures. Our Comfort Membership includes two tune-ups per year, priority service, reduced diagnostic fees, and a lifetime warranty on repairs. It's the most cost-effective way to protect your system and avoid emergency repair bills.
Do I need a permit for HVAC work in Dallas?
Yes — most HVAC replacements and new installations require a permit in Dallas. Reputable HVAC contractors (including Serveway) pull permits automatically. Be wary of any contractor who suggests skipping permits — it's illegal and can create issues when selling your home.
How can I lower my energy bills in summer?
Set your thermostat to 78°F when home and 82–85°F when away. Use ceiling fans to feel cooler without lowering the thermostat. Keep blinds closed on west-facing windows in afternoon. Schedule an annual AC tune-up. Seal duct leaks. And consider a smart thermostat — it pays for itself quickly in Texas.
Still have questions?
Call us and get a straight answer from someone who actually knows your system.