24/7 emergency plumbing and HVAC across North DFW. A live person answers, day or night.   Call (469) 813-7100
CALL 24/7(469) 813-7100 Schedule Service
Plumbing Drain CleaningWater Heaters Trenchless SewerLeak Detection Slab Leak RepairRepiping & Water Mains All Plumbing Services Heating & Cooling AC RepairAC Installation Heating & FurnaceHeat Pumps Mini-Split / DuctlessTune-Ups & Maintenance Indoor Air QualityThermostats & Controls All Heating & Cooling More CommercialService Areas FinancingVeterans AboutReviews OffersSchedule Service
Heating & Cooling guide

Repair or Replace Your AC? A Westlake Homeowner's Guide

By Rush Plumbing & Air · Updated July 23, 2026

The quickest way to decide in Westlake, TX is the age-and-cost test: if your AC is over 10 to 12 years old and a repair costs more than about one-third of a new system, replacement usually wins. Rising bills, an old R-22 charge, and repeat breakdowns tip the scale further. Rush Plumbing & Air gives a free second opinion before you spend. Call (469) 813-7100.

Repair or replace? A quick North DFW guide
Your situationUsually the smart move
Under 10 years old, one failed partRepair
Over 10 to 12 years and repair tops one-third of a new systemReplace
Still on phased-out R-22 refrigerant with a leakReplace
Repeated breakdowns two seasons runningReplace
Rising bills but system otherwise soundTune-up, then decide

What is the one-third rule for AC replacement?

A widely used guideline: multiply the age of the unit by the repair cost, and if that number tops about 5,000, replacement is usually the better value. More simply, if the fix costs more than roughly a third of a comparable new system and the unit is past 10 years, put the money toward a new one. A modern high-efficiency system can also cut cooling costs meaningfully versus a worn-out 15-year-old unit.

Does refrigerant type affect the decision?

Yes, and it matters more every year. Systems built before 2010 often use R-22 refrigerant, which is phased out and now costs several times more than modern R-410A. Once an R-22 system springs a leak, recharging gets expensive fast, and that alone often justifies replacement. A new system uses current refrigerant and comes with a fresh manufacturer warranty. We size any replacement with a real load calculation, not a guess. See AC installation.

Can I finance a new system in Westlake?

Yes. Rush offers financing through Wisetack, GreenSky, and Synchrony so a replacement becomes a manageable monthly payment instead of a lump sum. We show the full price and the monthly number side by side, and our price-match keeps the quote honest against any licensed competitor.

Serving Westlake and all of North DFW. Rush Plumbing & Air runs licensed plumbing and HVAC with upfront flat pricing, financing through Wisetack, GreenSky, and Synchrony, and a price-match on written quotes. A live person answers 24/7 at (469) 813-7100.

Get a Free Estimate See service areas

Common questions

Should I repair or replace my air conditioner?
In Westlake, use the age-and-cost test. If your AC is more than 10 to 12 years old and the repair would cost more than about one-third of a comparable new system, replacement is usually the smarter long-term value. Repeat breakdowns two summers running, steadily rising energy bills, and an older phased-out R-22 refrigerant charge all push toward replacement, while a newer unit with a single failed capacitor or motor is worth repairing. A modern 16-SEER2 system can noticeably lower cooling costs compared with a worn 15-year-old unit that has lost efficiency. Rush Plumbing and Air gives a free second opinion so you are not pressured into a sale you do not need, and if replacement makes sense we size it with a real Manual J load calculation and offer monthly financing through Wisetack, GreenSky, and Synchrony. Call (469) 813-7100 for an honest assessment across North DFW.
How long does an AC last in North Texas?
A central air conditioner in the North Texas climate typically lasts 12 to 15 years, sometimes longer with regular maintenance, though the punishing summer workload here often shortens that range. Systems that skip seasonal tune-ups, run on dirty filters, or were oversized from the start tend to fail years earlier. Once a unit passes the 10-year mark, parts get harder to source, efficiency drops, and each repair buys less remaining life for the money. If your system is aging and facing a major repair like a compressor, evaporator coil, or condenser fan motor, replacement usually delivers better long-term value than sinking cash into an old unit. Rush provides a free second opinion, prices any new system with financing, and backs installs with a one-year workmanship guarantee. An annual spring tune-up is the single best way to reach the top of that 15-year lifespan. Call (469) 813-7100.
What size AC do I need for my home?
AC size should come from a load calculation, not a rule of thumb or the tonnage of the old unit. A proper Manual J calculation accounts for your home's square footage, insulation levels, window count and orientation, ceiling height, sun exposure, and the local Texas design temperature near 100 degrees. An oversized system short-cycles, cools unevenly, and never removes enough humidity, leaving the house cold but clammy, while an undersized one runs nonstop and still cannot keep up in July. Rush Plumbing and Air runs a real load calculation before quoting any replacement so your new system is matched to your actual home, not a generic guess. We then pair the correct air handler and coil so the whole system performs at its rated SEER2 efficiency, and we back the install with a one-year workmanship guarantee. Financing is available through three lenders. Call (469) 813-7100 to schedule an estimate.

Related heating & cooling services

AC Repair

AC Repair

Same-day diagnosis and flat-price fixes.

Learn more
 AC Installation

AC Installation

New systems sized with real load math.

Learn more
 Tune-Ups

Tune-Ups

Seasonal service so units last longer.

Learn more

Get a free second opinion

Repair or replace, we will tell you straight. Tell us what is going on and a member of our team gets right back to you. For immediate help, call a live person now, day or night.

Call us now(469) 813-7100
  • Upfront flat pricing, approved before we start
  • Plumbing and HVAC from one licensed crew
  • Financing and price-match available

We respond to most requests within one business hour.

Need it looked at today?

Book online or ask a live person a question, day or night. Financing and price-match available.

Schedule ServiceCall (469) 813-7100