AC Repair or Replace? A Houston Homeowner’s Decision Guide

By the HomePro Finder Guides team ·

The short answer
Repair is usually the better call when your AC is under about 10 years old, the fix is a single part, and the system has kept your house cool and dry. Start pricing a replacement when the system is more than 10 years old (ENERGY STAR's rule of thumb), needs frequent or major repairs, or can't keep up with a Houston summer. As a national benchmark, Angi's 2026 cost data puts AC repairs at $450 to $2,000 or more and an AC replacement at $5,978 on average (range $1,400 to $12,500). Those are national figures, not Houston prices, and local quotes vary. Ready to compare? Browse HVAC contractors in Houston and request a quote from any listing.

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Is your AC worth fixing? The 3-question test

Should you repair or replace your AC in Houston? Use age, repair cost, efficiency rules, refrigerant and comfort to decide, plus how to compare quotes.

Video includes AI-generated imagery.

Transcript

Is your AC worth fixing? Try the three-question test. Question one: how old is the unit? Check the label on the outside unit or ask the tech. Question two: what does the repair cost compared with replacing it? Get both prices in writing. Question three: how often does it break down? If you're calling for repairs again and again, write that down. And before anyone works on it: Texas licenses AC contractors. Look up the tech's license at tdlr.texas.gov/LicenseSearch.

Houston air conditioners work harder than most. Here's a simple way to decide whether to fix yours or replace it, and how to compare quotes once you've decided.

Why Houston changes the math

Bush Intercontinental Airport averages 111 days a year at 90°F or hotter, based on the 1991–2020 climate normals (NOAA NCEI; NWS Houston/Galveston). July and August average highs sit near 95°F. That's a long season of hard running, and our humidity means your AC has to pull moisture out of the air as well as cool it.

So a system that limps through a mild spring may fail on the first 98-degree week in June. When you weigh a repair, ask not just "will this fix it?" but "will this get me through August?"

The 5-question test

1. How old is the system? The manufacture date is usually on the rating plate on the outdoor unit. ENERGY STAR suggests you consider replacing a central air conditioner or heat pump that's more than 10 years old (ENERGY STAR). Angi's 2026 guide puts the typical life of a central AC at 12 to 17 years (Angi, 2026). Age alone doesn't mean replace, but it should make you price both options.

2. What's actually broken? Small parts, such as a capacitor, contactor, fan motor or a clogged condensate drain, are usually worth fixing on a system of any age. A failed compressor, a leaking evaporator coil or repeated refrigerant leaks are the big-ticket repairs. Those are the ones where you should get a replacement quote side by side before you say yes.

3. How often has it needed help? ENERGY STAR lists frequent repairs and rising energy bills as signs it may be time to replace. If this is the second or third service call in a year, add up what you've spent and what the next repair will cost.

4. Is it keeping the house comfortable and dry? Rooms that never cool, a muggy feel even when the thermostat is satisfied, or excess dust can point to equipment, duct or sizing problems, according to ENERGY STAR. A new unit won't fix leaky or undersized ducts on its own, so ask the contractor to check them either way.

5. What refrigerant does it use? The refrigerant type is on the rating plate. EPA rules now restrict new residential AC systems to lower-global-warming refrigerants, with an exception for systems whose parts were all made or imported before January 1, 2025. Parts used to repair an existing system aren't restricted by those rules (EPA, updated Aug 28, 2026). Ask each contractor how the refrigerant in your system affects the repair cost now and parts availability later.

What drives the cost

For a repair: the part, the labor time, any refrigerant needed, whether it's an after-hours call, and how easy the unit is to reach (attic air handlers take longer). Ask for the diagnosis and the price in writing before the work starts.

For a replacement: Angi's 2026 national data puts replacing an existing central unit, where the ductwork and electrical are already in place, at $3,887 to $8,073 for most homeowners. It lists new ductwork at $3,000 to $7,500 when it's needed (Angi, 2026). These are national numbers, so treat them as a sanity check, not a Houston quote. What moves your number:

  • System size (tonnage). Bigger isn't better. An oversized unit cycles on and off, leaves the house clammy and costs more. Ask for a written load calculation instead of a match to the old unit's size.
  • Efficiency. Since January 1, 2023, a new split-system central AC installed in Texas must meet the Southeast regional minimum of 14.3 SEER2 (under 45,000 Btu/h; 13.8 SEER2 for larger units) (U.S. DOE). Higher SEER2 units cost more up front and use less electricity. Ask each bidder to show the yearly cooling-cost difference for your house, not just the rating.
  • Matched indoor and outdoor parts. Replacing only the outdoor unit can leave you with a mismatched system. Ask whether the quote includes the indoor coil.
  • Ductwork, electrical and the drain line. Leaky or undersized ducts, a new circuit or a new condensate line all add cost.
  • The permit. The City of Houston requires a permit to install, repair or replace a condensing unit, with plan review and inspection (Houston Permitting Center). A whole-system replacement has its own permit type (Houston Permitting Center). Ask who pulls it and whether the fee is in the quote. Outside city limits, check with your own city or county.
  • Timing. A replacement during a July heat wave is a rush job. If your system is old but working, getting quotes in fall or spring gives you time to compare.

How to check an HVAC contractor's license

Texas requires an Air Conditioning and Refrigeration (ACR) contractor license from the Texas Department of Licensing and Regulation (TDLR) to install or repair home AC systems (TDLR ACR program). Checking takes a minute:

  1. Ask for the contractor's TDLR license number. It should appear on the quote.
  2. Go to the TDLR License Search and pick Air Conditioning and Refrigeration.
  3. Search by license number or name. Confirm the license is active and the name matches the company on your quote.

For a step-by-step walk-through, see How to Check a Texas Contractor's License Before You Hire.

How to compare AC quotes

  • TDLR license number on the quote, checked on the TDLR site.
  • Diagnosis in writing: what failed, and why.
  • Repair and replacement priced side by side if the system is over 10 years old or the repair is major.
  • Load calculation for any replacement, not just "same size as before."
  • Model numbers for the outdoor and indoor units, with the SEER2 rating.
  • What's included: coil, thermostat, drain line, electrical, duct repairs, haul-away.
  • Permit: who pulls it, and whether the fee is included.
  • Warranty in writing: parts and labor, how long each lasts, and whether you have to register the equipment.
  • Liability insurance: ask for a current certificate.

On HomePro Finder, you can request a quote from any listing. Phone numbers unlock on Pro+ profiles. Reviews come only from verified customers, so you're reading about real jobs, not copied stars. Planning ahead for storm season too? See Hurricane Season Home Prep for Houston and Pearland.

Frequently asked questions

How do I know if my AC is worth fixing?

Look at age, the size of the repair and how often it's failed. A single-part repair on a system under about 10 years old is usually worth it. For an older system that needs a compressor, a coil or repeated refrigerant work, get a replacement quote side by side.

How much does it cost to replace an AC in Houston?

It depends on size, efficiency, ductwork, electrical work and the permit. Angi's 2026 national data puts an AC replacement at $5,978 on average, with a range of $1,400 to $12,500. Houston quotes can land above or below that, so compare at least three itemized local quotes.

What is SEER2, and what's the minimum in Texas?

SEER2 is the federal efficiency rating for air conditioners under the test method used since 2023. A new split-system central AC installed in Texas must be at least 14.3 SEER2, or 13.8 SEER2 for units of 45,000 Btu/h and up.

Can I replace just the outdoor unit?

Sometimes, but a mismatched indoor coil can hurt efficiency and comfort and may affect the warranty. Ask the contractor to explain in writing whether your indoor coil is compatible.

Do I need a permit to replace my AC in Houston?

Yes. The City of Houston requires a permit to install, repair or replace a condensing unit, and the work is inspected. Your quote should say who pulls the permit.

How do I check an HVAC contractor's license in Texas?

Ask for the TDLR license number, then look it up on the TDLR License Search under Air Conditioning and Refrigeration. Make sure the license is active and the name matches your quote.

Ready to get quotes? Compare HVAC contractors in Houston and request a quote from any listing.

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