FURNACE MAINTENANCE, LEWISVILLE, TX

Yes, you do need furnace maintenance even if you barely use your heater in North Texas. In fact, you arguably need maintenance more than homeowners in colder climates. Your furnace sits idle for six to eight months between uses, accumulating dust and causing the seals to dry out and the ignitor to oxidize. Then winter arrives, and you suddenly need your furnace at full demand. This pattern of no use to full power is exactly why most DFW furnace breakdowns happen in the first two weeks of December. Plus, a neglected gas furnace can release carbon monoxide (CO) into your home without any warning, as it’s colorless and odorless. The heat exchanger is designed to keep combustion gases separate from the air you breathe, but if it cracks—often due to temperature swings—those gases can leak into your home. The CDC reports over 400 deaths each year from CO exposure, and during Winter Storm Uri in 2021, the Dallas-Fort Worth area saw more than 300 cases in a single week. Our professional tune-ups include combustion analysis to measure CO levels and ensure safety.

We recommend scheduling maintenance for your furnace or heat pump in September or October, before temperatures plummet and before our schedule fills up with emergency calls. Schedule your tune-up in fall and you'll get your pick of appointment times, plus the peace of mind of knowing your system is ready before you need it. If we discover you're dealing with an issue, like a faulty thermostat or malfunctioning variable speed motors, we can provide reliable furnace repair services without the stress of an emergency call-out.

Furnace tune-up pricing in the Lewisville area typically starts at $89 for a basic inspection, which covers a quick safety check including the heat exchanger, gas connections, a basic CO test, filter change, and a written summary. A full tune-up, which is the most popular option, costs around $129 and includes a complete 22-point inspection, combustion analysis, cleaning of key components like burners and the flame sensor, full safety testing, and a detailed report with photos. If you have both heating and cooling systems that need maintenance, we recommend our Joey Club membership, which starts from $160 per year and includes two seasonal tune-ups (furnace and AC), priority scheduling, 15% off repairs, waived diagnostic fees, and no overtime charges. It's better overall value than paying for individual visits.

A proper 22-point tune-up for a residential heating system takes our team 45 to 90 minutes, depending on the age of the system, how clean it is, and what we find during inspection. If you commit to regular maintenance, it should take us about an hour to check that your furnace is operating safely. Anyone promising a 'quick 20-minute tune-up' is skipping steps! Combustion analysis alone takes 10 to 15 minutes to do correctly.

You can handle basic furnace maintenance yourself, including changing the filter every 30–60 days, checking that the pilot light is blue (not yellow), clearing supply and return vents, testing carbon monoxide detectors monthly, and listening for unusual noises at startup. But anything involving the gas line, combustion analysis and CO testing, heat exchanger inspection, electrical components, gas pressure adjustments, ignition system repairs, or work inside the burner compartment should be left to a licensed professional, like our technicians at Koala-T. We have the specialized tools, code compliance, and experience to catch issues before they become serious safety risks or costly repairs.

Your furnace might have a carbon monoxide leak if you notice a yellow or orange pilot flame instead of blue; soot streaks around the furnace, and excess condensation on windows. But even if there are no signs of a malfunctioning furnace, it might still be leaking carbon monoxide. CO is colorless and odorless, which is why you need working CO detectors on every floor and professional combustion testing at least once a year. If you're experiencing unexplained headaches, dizziness, or nausea that improve when you leave the house, call the emergency services immediately.

To determine whether you should replace a 15-year-old furnace, apply the '$5,000 rule': multiply the repair cost by the furnace age. If that number is greater than $5,000, we'll typically recommend our new furnace installation services as the most cost-effective solution. Also consider the frequency of repairs (if you're paying for constant repairs for repeating furnace problems, it'll probably make more sense to get a new one), and whether you've noticed higher energy bills year over year.

Yes. Koala-T Heating & Air holds Texas HVAC license TACLA00153892E. We're a registered Texas LLC, insured and bonded up to $1 million through Hartford Insurance. All our technicians are background-checked, drug-tested, and licensed through the Texas Department of Licensing and Regulation (TDLR). You can verify any Texas HVAC contractor's license on the Texas Department of Licensing and Regulation website.