Does SAVA give repair vs. replacement comparisons?

Yes. After diagnosing your system, SAVA provides an honest side-by-side comparison of repair cost vs. replacement cost when the decision is close. We don't push replacement when repair is the right call—and we don't recommend costly repairs when a new system is clearly the better value.

Is it worth repairing an AC that uses R-22 refrigerant?

R-22 (Freon) was phased out of production in 2020. Supply is limited and prices are high. If your R-22 system has a refrigerant leak, the cost of sourcing and recharging R-22 often makes repair economically impractical—especially for older units. Replacement with a modern R-410A or R-32 system is usually the better investment.

What repairs on an AC are almost always worth doing?

Repairs that are almost always cost-effective regardless of system age include capacitor replacement, contactor replacement, thermostat replacement, drain line clearing, and coil cleaning. These are low-cost repairs that restore full function with minimal investment. Major repairs — compressor replacement, coil replacement, refrigerant leak repair on older systems — require applying the 5,000 rule before committing.

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Should I Repair or Replace My AC? How to Decide

Q: Should I repair or replace my AC?

Use the 5,000 rule: multiply the system's age (in years) by the repair cost. If the result is over $5,000, replacement is usually the smarter investment. Units under 10 years old are almost always worth repairing. Units over 15 years old facing major repairs—especially compressor failure or refrigerant leaks on R-22 systems—warrant a replacement comparison.

Q: What is the 5,000 rule for AC repair?

The 5,000 rule is a simple decision framework: multiply the age of your AC unit (in years) by the estimated repair cost (in dollars). If the result exceeds 5,000, replacing the system is usually the more cost-effective choice. For example, a 12-year-old unit with a $500 repair scores 6,000—suggesting replacement is worth considering.

Q: How much does it cost to replace a central AC system?

The average cost of a new central AC system in the U.S. ranges from $3,800 to $7,500 installed, according to industry data. In the Chicago area, installed costs typically fall between $4,500 and $8,500 depending on system size (tonnage), efficiency rating (SEER), and any ductwork modifications needed.

Q: How much does SEER rating matter when deciding to repair or replace?

SEER rating significantly affects long-term operating costs. Upgrading from a 10 SEER system (common in units 15+ years old) to a 16 SEER system reduces cooling energy consumption by approximately 38%, according to the U.S. Department of Energy. Over a 15-year lifespan, this efficiency gain can offset a significant portion of the replacement cost.

Published: May 2, 2026 · By SAVA HVAC & Appliance Repair

The short answer: if your AC is under 10 years old, repair it. If it's over 15 years old and facing a major failure, get a replacement quote before committing to the repair. Everything in between comes down to one practical framework and a few key factors.

Key Takeaways

Use the 5,000 rule: age × repair cost — if over $5,000, replacement is usually the better investment.
AC units under 10 years old are almost always worth repairing; units over 15 years old warrant a replacement comparison on major failures.
R-22 refrigerant systems with leaks are nearly always better candidates for replacement — R-22 was phased out in 2020 and supply is scarce.
Upgrading from a 10 SEER to a 16 SEER system cuts cooling energy use by approximately 38%, per the U.S. Department of Energy.

The 5,000 Rule: The Industry Standard for Repair vs. Replace Decisions

The most widely used decision tool in HVAC is the 5,000 rule: multiply the age of your system (in years) by the estimated repair cost (in dollars). If the result exceeds 5,000, replacement is usually the smarter long-term investment.

Example A: 6-year-old unit × $400 repair = 2,400 → Repair makes sense.
Example B: 12-year-old unit × $600 repair = 7,200 → Replacement is worth considering.
Example C: 14-year-old unit × $1,200 compressor repair = 16,800 → Replace.

This rule isn't perfect—it doesn't account for energy efficiency gains or refrigerant type—but it gives you a fast, reliable starting point before a technician arrives.

How System Age Should Drive Your Repair vs. Replace Decision

A central AC system has an average lifespan of 15–20 years with regular maintenance, according to the U.S. Department of Energy. Here's how to think about age:

Under 10 years old: Repair is almost always the right call. You have 5–10 years of useful life remaining. Even a $600–$800 repair is a fraction of replacement cost.
10–14 years old: Evaluate each repair individually. Small electrical repairs still make sense. A failed compressor or major leak on a 13-year-old system warrants a replacement comparison.
15+ years old: You're in end-of-life territory. When major components fail, replacement usually offers better long-term value—especially with modern energy-efficient systems that can reduce cooling costs by 20–40%.

The Refrigerant Question: R-22 vs. R-410A and When It Changes the Math

If your system uses R-22 refrigerant (Freon)—common in units installed before 2010—and it has a refrigerant leak, this changes the math significantly. R-22 production was phased out in 2020 under the EPA's Clean Air Act regulations. Supply is shrinking, prices are high, and recharging an R-22 system with a leak is often not economically practical.

Modern systems use R-410A or R-32, which are more efficient, environmentally safer, and readily available. If you're not sure which refrigerant your system uses, check the data plate on the outdoor condenser unit—it's listed there.

Repairs Worth Making vs. Repairs to Reconsider

Almost Always Worth Repairing

Capacitor replacement — fast, inexpensive, extends system life significantly
Contactor replacement — simple electrical repair, quick turnaround
Thermostat failure — low cost, restores full system function
Clogged drain line — maintenance-level fix, prevents water damage
Dirty evaporator or condenser coil — cleaning restores efficiency

Evaluate Before Committing

Refrigerant leak repair — depends on refrigerant type, leak location, and system age
Blower motor replacement — worthwhile on newer systems, borderline on older ones
Evaporator coil replacement — expensive; apply the 5,000 rule before proceeding

Get a Replacement Quote First

Compressor replacement on a system over 12 years old
Any major repair on an R-22 system
Second or third major repair within 2–3 years
Repairs totaling more than 50% of a new system's cost

Energy Efficiency: The Hidden Factor in Every Repair vs. Replace Decision

A 15-year-old AC system typically has a SEER rating of 10–12. Modern systems range from 14–26 SEER (the DOE minimum for new equipment in the Chicago region is 14 SEER; high-efficiency units reach 20–26 SEER). According to the U.S. Department of Energy, upgrading from a 10 SEER to a 16 SEER system reduces cooling energy consumption by approximately 38%. In Chicago, where summers are increasingly demanding, that efficiency gap adds up to real money over a system's 15–20 year lifespan.

According to ASHRAE (the American Society of Heating, Refrigerating and Air-Conditioning Engineers), "equipment efficiency and system performance degrade measurably when systems are operated beyond their design service life without major component replacement." In plain terms: an old system running at reduced efficiency costs more to operate every month than the repair cost might suggest.

The ACCA (Air Conditioning Contractors of America) recommends that any replacement decision include a Manual J load calculation to ensure the new system is correctly sized — not just a swap for the same tonnage. Approximately 50% of AC systems in existing U.S. homes are improperly sized, according to ACCA research, meaning a direct replacement without a load calculation may repeat the original sizing error.

This doesn't automatically mean replacement is better—but it's a factor worth including in your comparison, especially if your current system is already running inefficiently.

How SAVA Handles the Decision

After diagnosing your system, SAVA provides an honest comparison when the repair vs. replace decision is close. We show you the repair cost, the expected remaining useful life of the current system, and a replacement estimate—so you can make an informed choice. We don't push replacement to increase ticket size, and we don't recommend expensive repairs on systems that are clearly past their useful life.

Frequently Asked Questions

Should I repair or replace my AC?

Use the 5,000 rule: age × repair cost. Under 5,000 — repair. Over 5,000 — get a replacement quote. Units under 10 years old are almost always worth repairing. Units over 15 years old facing major repairs should be compared to replacement cost before committing.

What is the 5,000 rule for AC repair?

Multiply the age of your AC (in years) by the repair cost (in dollars). If the result exceeds 5,000, replacement is usually the better long-term investment. It's a quick benchmark, not a hard rule—but it's widely used by HVAC professionals for good reason.

Is it worth fixing a 15-year-old AC?

It depends on the repair. Small electrical fixes on a 15-year-old unit can still make sense. Major repairs—compressor failure, refrigerant leaks, coil replacement—usually don't, especially when compared to a modern system's efficiency gains. We'll give you both numbers so you can decide.

My AC uses R-22. Should I repair or replace it?

R-22 was phased out in 2020. If your R-22 system has a refrigerant leak, recharging it is expensive and temporary—the leak will return without a permanent repair. On older systems, replacement with a modern R-410A or R-32 unit is almost always the better financial decision.

Does SAVA offer free repair vs. replacement comparisons?

Yes. After the diagnostic, when the decision is close, we provide an honest side-by-side comparison at no additional charge. The $79 diagnostic fee is credited toward the repair if you proceed.

How much does it cost to replace a central AC system in Chicago?

In the Chicago area, installed central AC replacement typically costs between $4,500 and $8,500 depending on system size (tonnage), SEER efficiency rating, and whether ductwork modifications are needed. The national average ranges from $3,800 to $7,500 installed. Getting a replacement quote is the only way to know if repair truly makes more financial sense.

Does SEER rating matter when deciding whether to repair or replace my AC?

Yes — significantly. Upgrading from a 10 SEER system (typical of units 15+ years old) to a 16 SEER replacement reduces cooling energy consumption by approximately 38%, per the U.S. Department of Energy. On a $300/summer electricity bill, that's roughly $115 saved annually — which adds up to thousands over a new system's lifespan.

What AC repairs are almost always worth doing regardless of age?

Capacitor replacement, contactor replacement, thermostat replacement, drain line clearing, and coil cleaning are almost always cost-effective — they're low-cost repairs that restore full system function quickly. Apply the 5,000 rule for bigger repairs: compressor replacement, coil replacement, or any major work on an R-22 system.

Not Sure Whether to Repair or Replace?

SAVA diagnoses your system and gives you an honest comparison — $79 diagnostic fee credited toward repair. Learn more about our AC repair service →

📞 Call (773) 558-3332