When your air conditioner breaks down in the middle of a Texas summer, you are forced into a fast, expensive decision: pay to fix the system you have, or invest in a new one. Knowing when to replace an AC unit instead of repairing it again can save you thousands of dollars and a lot of frustration.
There is no single right answer for every home, but there are clear signals that point one direction or the other. At Mission Ready Heating & Air, our job is to lay those out honestly so you can make the call that is right for your house and your budget, not ours. Here is the framework we walk Georgetown homeowners through.
The Quick Gut Check: The $5,000 Rule
A useful rule of thumb in the industry is the $5,000 rule. Multiply the age of your system in years by the cost of the repair being quoted. If the number is over $5,000, replacement usually makes more sense. If it is well under, repair is often the smarter money.
For example, a $400 repair on a 6-year-old unit comes to $2,400, clearly worth fixing. That same $400 repair on a 14-year-old unit comes to $5,600, a sign you are putting money into a system near the end of its life. It is not a hard law, but it is a fast way to frame the decision.
Signs It’s Time to Replace Your AC
Lean toward replacement when you see several of these together:
- Age of 10 to 15 years or more. Most systems last 12 to 15 years, and Texas heat, with its long, heavy cooling season, often pushes that toward the lower end.
- It uses R-22 refrigerant. Older systems run on R-22, which is no longer produced in the U.S. and has become very expensive. A refrigerant leak on an R-22 system can cost more to service than the repair is worth.
- Repairs are getting frequent. One fix is normal. A third repair call in two summers is a pattern, and the bills add up to real money.
- Rising energy bills. An aging system loses efficiency and runs longer to cool the same house. If your summer bills keep climbing with no change in habits, the unit may be the reason.
- Uneven cooling or humidity problems. Rooms that never get comfortable, or a house that feels clammy, can mean the system is undersized for the load it now faces.
When a Repair Makes More Sense
Repair is usually the better choice when the system is under about 10 years old, still under manufacturer warranty, and facing a one-off fix like a capacitor, contactor, or fan motor. These are common, affordable parts, and there is no reason to replace a healthy system over one of them.
The key is an honest diagnosis. A single failed part on an otherwise sound unit is a repair, not a reason to sell you a whole new system.
What Texas Heat Does to the Math
Two things make this decision different in Central Texas. First, our systems simply run more hours, so wear accumulates faster and a marginal unit fails sooner than the same unit would up north. Second, cooling is a large share of the yearly energy bill here, which means the efficiency gap between an old unit and a new high-efficiency system is bigger in dollars than it would be in a milder climate. If you are replacing anyway, the modern SEER2 efficiency ratings can meaningfully lower what you spend to stay cool for the next decade.
How We Help You Decide, Honestly
This is a big decision, and you deserve more than a sales pitch. Our licensed technician will diagnose the actual problem, tell you what the repair costs, and give you a straight comparison against replacement, including how much life your current system likely has left. If repair is the right move, we will say so.
Mission Ready is veteran-owned and built on doing right by people. When replacement is the better long-term choice, we offer financing so a new system does not have to be a financial emergency, plus a 10% service-call discount for active military, veterans, and first responders.
Get a Straight Answer Before You Spend
Before you sink more money into an aging unit, or replace one that has good years left, get an honest assessment. We serve Georgetown and all of Williamson County, from Liberty Hill and Leander to Round Rock, Hutto, and Salado.
Request service through our contact page, and we will help you make the right call.
Frequently Asked Questions
How long does an AC unit last in Texas?
Most systems last 12 to 15 years, but the long Central Texas cooling season often pushes real-world lifespan toward the lower end, especially without regular maintenance.
Is it worth repairing an old AC unit?
If the system is over about 12 years old, uses R-22 refrigerant, or is on its third repair in two years, repair money is often better put toward replacement. A one-off part failure on a newer unit is usually worth fixing.
What is the $5,000 rule for AC replacement?
Multiply your system’s age by the repair cost. If the result is over $5,000, replacement generally makes more sense. Under that, repair is usually the better value.
Does a new AC unit really lower energy bills?
In Texas it can make a noticeable difference, because cooling is such a large part of the yearly bill. A modern high-efficiency system uses less energy to cool the same home than a worn, older unit.
