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Repair or Replace Your AC?
Run the Numbers

The $5,000 Rule turns a stressful judgment call into simple math: your system's age times the repair quote. Two fields, ten seconds, an honest answer.

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The Question Every Repair Quote Raises

Is this the last repair, or the first of many? The $5,000 Rule gives you a fast, unemotional read: multiply your system's age in years by the repair estimate in front of you. Under $5,000, repair it and move on. Over $5,000, that money is usually better spent on a new system.

Enter your system's age and the repair quote below. Adding your SEER rating sharpens the answer, because an old, inefficient unit costs you twice: once for the repair, and again on every Entergy or SLEMCO bill it runs up afterward.

Should You Repair or Replace?

The industry-standard "$5,000 Rule" multiplies your system's age by the repair cost. If the result exceeds $5,000, replacement is usually the smarter investment.

How the Calculator Decides

The score is age times repair cost, measured against the $5,000 threshold. But the calculator doesn't stop there. A system 15 years or older, or one rated 10 SEER or below, gets nudged toward replacement even on a borderline score, because at that age and efficiency the next repair is rarely far behind. Scores that land within about 20% of the threshold are flagged as a close call rather than forced into a verdict.

Louisiana context matters here. A system that has run eight-month cooling seasons for 15 years has done the work of a 20-year-old system somewhere milder. That's why the typical lifespan in South Louisiana is 15 to 20 years, and why we weigh age as heavily as the repair quote itself.

If the verdict is repair, a maintenance plan is the cheapest way to stretch more years out of the system you have. If it's replace, start with our published price tables so you know what the numbers look like before anyone visits your home.

AC Repair or Replace Calculator FAQs

What is the $5,000 Rule?
The $5,000 Rule is a widely used HVAC industry guideline. Multiply your system's age in years by the estimated repair cost. If the result exceeds $5,000, it's generally more cost-effective to replace the system rather than keep sinking money into repairs. A $600 repair on a 12-year-old system scores $7,200, which points to replacement.
How accurate is the $5,000 Rule?
It's a guideline, not a law. It works because it weighs the two things that matter most: how much life the system has left and how much you're being asked to spend on it. Our calculator also factors in your system's age and SEER rating, since a 15-year-old unit or one rated 10 SEER or below tips the math toward replacement even at a borderline score. A professional assessment gives you the definitive answer.
My score came out close to $5,000. Now what?
A borderline score means the decision comes down to details the math can't see: the condition of your compressor and coils, your ductwork, how the system handles Louisiana humidity, and whether repair quotes keep stacking up. That's exactly when an in-person inspection earns its keep. We'll tell you plainly which side of the line your system is on.
How long should an AC system last in Louisiana?
A properly installed and maintained system typically lasts 15 to 20 years in South Louisiana. Our cooling season runs roughly eight months, so systems here log more hours per year than in most of the country. Regular maintenance is the best way to reach the far end of that range.
Are there other signs I should replace instead of repair?
Two good checks beyond the $5,000 Rule: if a single repair costs more than half the price of a new system, or if you've spent more than $1,000 on repairs over the past two years, replacement is almost always the smarter investment. Our guide to the seven warning signs covers what we see most in aging Acadiana systems.

More Free HVAC Tools

System Cost Estimator

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AC Price Tables

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SEER2 Savings

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AC Sizing

Estimate the tonnage your home needs.

Prefer a Human Answer?

Calculators get you close. Our comfort advisors get you certain. Call (337) 893-5646 or schedule a free in-home assessment.

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