Repair or Replace? An Honest Framework

Your HVAC system just broke. The repair quote isn't cheap. Someone at the office tells you "just get a new one." Your neighbor says "they don't make them like they used to." Here's how to actually think through this decision without the noise.

The question nobody wants to answer honestly

Let's get something out of the way: HVAC companies make more money on replacements than repairs. That's just a fact. A new system installation is a $7,000–$15,000 job. A repair might be $300–$800. So when an HVAC company says "you should really just replace it," you're right to wonder if that recommendation is about your best interest or theirs.

We're going to give you a framework you can use regardless of which company you call. If the math says repair, repair. If it says replace, we'd love to be the ones to do it — but the decision should be yours, based on real information.

The 50% rule (and when to ignore it)

The most common rule of thumb: if the repair costs more than 50% of what a new system would cost, replace it. This is decent as a starting point, but it's oversimplified. A $2,000 repair on a 4-year-old, $12,000 system is very different from a $2,000 repair on a 17-year-old, $6,000 system.

A better framework considers three factors together:

Factor 1: Age of the system

Gas furnaces typically last 15–20 years. Heat pumps last 12–17 years. Air conditioners last 15–20 years.

Where your system falls in its lifespan changes the math:

• Under 10 years old: Almost always worth repairing, unless it's a catastrophic failure (cracked heat exchanger, compressor burnout on a system without warranty).
• 10–15 years old: Judgment call territory. Consider the repair cost relative to the system's remaining useful life.
• Over 15 years: Lean toward replacement, especially if this isn't the first major repair. You're investing in a system that's approaching end-of-life.

Factor 2: Frequency of repairs

One repair in 12 years? That's a good run. But if you've had the repair truck out three times in the last two winters, there's a pattern. Aging systems don't fail once and then run fine forever. They fail, get fixed, and then something else goes. Each repair buys you time, but the intervals tend to get shorter.

Keep a mental tally. If total repair costs over the past 2-3 years are approaching $1,500–$2,000, that money could have been a down payment on a new system that comes with a full warranty and 15+ years of reliable operation ahead of it.

Factor 3: What's actually broken

Some repairs are genuinely routine:

• Capacitor replacement ($150–$300) — fix it and move on
• Ignitor replacement ($200–$350) — common, easy, worth doing
• Blower motor ($400–$700) — more significant, but reasonable on a younger system
• Control board ($400–$800) — fair repair on a system under 12

Some repairs are red flags:

• Cracked heat exchanger ($1,500–$2,500+ for the part alone) — this is the big one. A cracked heat exchanger can leak carbon monoxide. Most of the time, if your heat exchanger is cracked and the system is over 12 years old, replacement is the right call. The repair cost is high, and a cracked heat exchanger often signals that other components are aging out too.
• Compressor failure ($2,000–$3,000+) — the compressor is the heart of a heat pump or AC. On a system under warranty or under 8 years old, it's worth replacing. On an older system, this is usually the tipping point toward a new installation.
• Refrigerant leak on an R-22 system — R-22 (Freon) was phased out. If your system still uses it and develops a leak, you're looking at expensive refrigerant costs and a system that can't be serviced long-term. Time to move on.

The factors most people forget

Your energy bills

A 15-year-old furnace running at 80% AFUE is costing you measurably more per month than a new 96% system would. A 12-year-old heat pump rated at 13 SEER is using 30–40% more electricity than a modern 18 SEER2 unit. When you're weighing "repair for $800" vs. "replace for $10,000," factor in the monthly savings on the new system. Over 15 years, that difference can be $3,000–$6,000 in energy costs — real money that offsets the replacement price.

Rebates and incentives

PSE rebates can take $600–$2,400 off a new system right now. Federal energy credits may apply. Financing options make the monthly payment manageable. None of these apply to repairs. If you're on the fence, the current rebate environment tips the scales toward replacement more than usual.

Your comfort

Older systems don't just cost more to run — they run worse. Single-stage furnaces blast hot air and then shut off, creating temperature swings. Older heat pumps struggle in cold weather. New variable-speed and two-stage systems maintain consistent, even temperatures throughout your home. If you've been "living with" uneven heating, cold spots, or a system that's too loud, replacement fixes all of that.

The honest answer

There's no universal right answer. A good HVAC company should walk you through the specific factors for your system, your home, and your budget — and be willing to recommend a repair when a repair is the right call, even though replacement pays them more.

When we do an in-home evaluation, we'll show you the math both ways: what the repair costs now and what you can expect going forward, versus what a new system costs with rebates and financing and what your energy savings would look like. Then you decide.