The $5,000 Rule: Should You Repair or Replace Your AC in Las Vegas?
The quick answer: multiply the age of your system by the quoted repair cost. If the result is over $5,000, replacement usually makes more financial sense than repair. Under it, repair usually wins.
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How the rule works
The $5,000 rule is the HVAC trade’s standard gut-check for repair-vs-replace decisions:
Age of system (years) × repair cost ($) = score.
Score over $5,000 → lean replacement. Score under $5,000 → lean repair.
The logic is that repair dollars spent on old equipment buy less remaining life than the same dollars toward new equipment. It is a heuristic, not physics — but it tracks reality surprisingly well.
Las Vegas examples
| Situation | Math | Score | Lean |
|---|---|---|---|
| 4-year-old system, capacitor failure, $250 quote | 4 × $250 | $1,000 | Repair, clearly |
| 7-year-old system, blower motor, $700 quote | 7 × $700 | $4,900 | Repair, just under the line |
| 9-year-old system, compressor, $1,800 quote | 9 × $1,800 | $16,200 | Replace — unless the compressor is under warranty |
| 14-year-old R-22 system, leak repair + recharge, $1,200 quote | 14 × $1,200 | $16,800 | Replace |
| 11-year-old system, third repair in two years, $600 quote | 11 × $600 | $6,600 | Replace — repair history confirms it |
Why the rule bends in Las Vegas
Three local factors push the effective line around:
1. Run hours make “age” mean more
A valley system runs April through October, often 12–16 hours a day in peak summer — roughly double the annual hours of a system in a mild climate. A 10-year-old Las Vegas system has lived something like a 15–18-year life elsewhere. Many technicians here apply the rule with an adjusted age, which pushes borderline cases toward replacement.
2. R-22 refrigerant breaks the math
Systems installed before roughly 2010 often run R-22, which is phased out and costs $90–$250 per pound. A leak repair plus recharge on an R-22 system can cost $1,000+ — and the leak-prone coil is still old. On R-22 systems, treat the $5,000 line as more like $3,000–$4,000.
3. Warranty status cuts repair cost in half
Manufacturer parts warranties run 5–10 years. A failed compressor under warranty costs you labor, not the part — and the rule should use the number you actually pay. Always have the serial number checked before running the math.
When the rule doesn’t apply
- Very cheap repairs. A $200 contactor on a 16-year-old system scores $3,200 — repair it, but start budgeting for replacement; you are on borrowed time either way.
- Selling the home soon. A working-but-old system with a fresh repair often makes more sense than a $7,000 replacement you will not enjoy.
- Safety failures. A cracked furnace heat exchanger is a replace decision at any score — carbon monoxide risk is not negotiable.
- Efficiency jump. Replacing a 10 SEER unit from 2005 with modern equipment can cut summer cooling bills substantially in a six-month cooling season — sometimes enough to change the math on its own.
Get both numbers before you decide
The rule only works with real inputs. Ask the technician for the repair price and a replacement range for your specific home — then the math takes two minutes. Current repair ranges by part are on the Las Vegas cost guide; if you are facing the decision right now, call +1 (725) 360-1290 and ask for both quotes.
Facing a big repair quote?
Call +1 (725) 360-1290 — get the repair price and the replacement range, then decide with real numbers.