What Does a Furnace Replacement Cost in Central Texas? (2026)

What does a furnace replacement cost in Central Texas in 2026?

For most Leander-corridor homes, a straightforward gas-furnace replacement lands between $3,500 and $8,000 installed. A basic single-stage swap on an easy-to-reach furnace can come in lower; a high-efficiency modulating furnace, or one tucked into a tight attic that needs new venting, runs higher. These are market ranges to plan with — not a quote for your home.

What’s actually included in a furnace replacement?

A furnace replacement means swapping the gas furnace — the heating half of your system that lives indoors — while keeping your existing air conditioner and, usually, the indoor coil that sits with it. That’s different from a full system change, where the furnace, the outdoor AC, and the coil are all replaced together as a matched set. Which one you need depends less on the furnace alone and more on the age and condition of everything it’s connected to.

Want a plain-English tour of AFUE, venting, and the safety parts that matter first? Read gas furnace basics.

Should you replace just the furnace or the whole system?

If the furnace is the only aging part — the AC is newer and working well — replacing the furnace by itself is usually the smart, lower-cost move. But a few things tip the math toward doing it all at once:

• The AC and coil are also near the end. If your air conditioner is 12–15+ years old, paying for two separate installs a year apart almost always costs more than one combined project.
• Matched components. Your furnace, coil, and AC are engineered to work as a set. Bolting a new furnace to an old, mismatched coil can cost you efficiency and may affect the manufacturer warranty.
• The 2025 refrigerant change. New cooling equipment now uses R-454B, which reset equipment pricing across the industry — matching a future AC is simpler when the system was replaced together.
• You’re open to a heat pump. If staying all-electric appeals to you, weigh the heat-pump cost and a full new-system price before sinking money into furnace-only.

What does a cheap furnace quote leave out?

The lowest number on paper is sometimes the most expensive choice. Before you compare quotes, make sure each one actually includes:

• A matched indoor coil. If the coil isn’t sized to the new furnace and AC, you lose efficiency and comfort.
• Proper venting and flue. High-efficiency furnaces vent differently; reusing the wrong flue is a safety and code problem.
• Gas & electrical done to code, not jury-rigged from the old setup.
• A permit and inspection. A changeout here is permitted work — see do you need an HVAC permit?
• A real heat-load calculation so the furnace is sized to your home, not just swapped like-for-like.

A quote that skips these isn’t cheaper — it just moves the cost to later. Our what an honest quote includes guide is a good checklist to hold any company to.

How does MLD price a furnace replacement?

MLD Services has replaced furnaces across the Leander corridor since 2009 (License TACLA37761C), and we’re a Factory-Authorized York dealer — though we install and service all major brands, because install quality matters more than the badge. We’re repair-first: if a safe, sensible repair buys you more good years, we’ll tell you. When replacement is the honest call, you get a flat, written price up front — no hourly surprises — after a free in-home assessment, and financing is available to spread it out.

What to do next

• Compare a full system: what a new AC or system costs here.
• Weighing all-electric? See heat-pump cost in Central Texas.
• Understand the equipment first with gas furnace basics.
• Lower the number with rebates & tax credits, or spread it out with financing.
• Already have a quote? Get a free second opinion before you spend a dollar.

Or call 512-528-4258 for an honest, no-pressure assessment — same-day & after-hours help is available.