Multiply your system's age by the repair quote. If the answer is under about $5,000, repair usually wins; if it's well over, price a replacement before you commit. Then adjust for three things: refrigerant (an R-22 system tilts hard toward replacement), repair frequency (two service calls a year is a pattern, not luck), and whether the failing part is the system's core or its periphery.
How do I run the math on my own system?
The screening tool the industry uses — and the one we'll show you on paper at your kitchen table — is the age × repair cost test:
| Factor | Leans repair | Leans replacement |
|---|---|---|
| Age × repair cost | Under ~$5,000 | Over ~$5,000 |
| System age | Under 10–12 years | Past 15 years |
| Refrigerant | Current refrigerant, no leaks | R-22 (banned from production/import since 2020), or a leaking R-410A system |
| Repair history | First real repair | Second-plus repair in two years |
| Failed part | Peripheral: capacitor, contactor, flame sensor, igniter | Core: compressor, heat exchanger |
| Comfort & bills | Heats/cools evenly, bills stable | Rooms never right, bills creeping up |
Age alone is not a diagnosis. A small, peripheral repair on a reliable 14-year-old system is often the honest recommendation.
Why does refrigerant change the answer so much?
Because it changes what a "repair" costs forever after. R-22 systems can only be recharged from reclaimed supply, at premium prices — every future leak is an expensive event on borrowed time. And the industry shifted new equipment to lower-GWP refrigerants like R-32 in 2025, which means today's replacement buys you into the refrigerant that parts and supply will follow for the next two decades. If your AC or heat pump has a refrigerant leak, ask what it runs on before you approve the recharge.
What does a replacement actually get me that a repair doesn't?
Three things, honestly stated: efficiency (modern inverter-driven equipment, like the Daikin systems we install as a Daikin Comfort Pro, modulates instead of blasting on/off — that shows up on the power bill), warranty (a new system restarts the clock with factory parts coverage, backed by our 100% satisfaction guarantee), and predictability (you stop budgeting for surprise service calls). What it doesn't get you is a return on money you didn't need to spend — which is why the framework above comes first.
What if I've already been told to replace?
Get the specifics — the failed part, the measurements, both prices — and then get a second set of eyes. We've reviewed replacement quotes across Walla Walla, College Place, Milton-Freewater and the whole valley since 1949, and a meaningful number of them were for systems worth repairing. Bring yours to our free second opinion; if the other company got it right, we'll tell you that too. And when replacement is the answer, our installation team sizes it with a real load calculation, not a guess.
Questions we hear about this
What is the $5,000 rule for HVAC repair or replacement?
It's an industry rule of thumb: multiply the system's age by the repair quote. Under roughly $5,000, repair usually makes sense; over it, replacement deserves a serious look. A $600 repair on a 5-year-old AC scores 3,000 — repair it. The same repair on a 15-year-old unit scores 9,000 — get replacement numbers before you commit. It's a screening tool, not a verdict.
How long should a furnace or AC last in the Walla Walla Valley?
Well-maintained equipment commonly serves 15 to 20 years for furnaces and around 12 to 17 for air conditioners and heat pumps — but maintenance history matters more than the calendar. A tuned system at 15 can be healthier than a neglected one at 8. Our valley's 100-degree summers work cooling equipment hard, which makes maintenance the biggest variable.
Does the refrigerant my AC uses affect the repair-or-replace decision?
Significantly. If your system still runs on R-22 — production and import were banned in the U.S. in 2020 — any refrigerant repair relies on reclaimed supply at premium prices, which tilts the math toward replacement. Newer R-410A systems are also mid-transition, as the industry moved to lower-GWP refrigerants like R-32 for new equipment in 2025. A repair-friendly refrigerant situation favors repair; a dead-end one favors replacement.
When is repairing an old system still the right call?
When the fix is small and unrelated to the system's core (a capacitor, a flame sensor, a contactor), when the system's been reliable otherwise, or when you're not planning to stay in the home long enough to recover a replacement's cost. Honest companies repair old equipment all the time — age alone is not a diagnosis.
How do I know a replacement recommendation is honest?
Ask for the failed part, the readings, and the repair price alongside the replacement price — a trustworthy diagnosis survives specifics. Then get a second opinion on any four- or five-figure recommendation. We review other companies' quotes free, and if their recommendation is right, we say so.
Your next step
Already been told you need a replacement? Bring us the quote. We'll confirm the diagnosis and the math — free, no obligation — and if their recommendation is right, we'll tell you that too.
Get a free 2nd opinion on your quote
Reviewed by Dennis Davis, President
With College Place Heating & Air since 1975. Family-owned since 1949 · Business license: 600-129-164.