Repair or Replace? A Straight Answer for an Aging Furnace or AC

You'll hear "if the repair costs more than 50% of a new system, replace it." It's not wrong, but it ignores three things that matter just as much: how many times you've already repaired this unit this year, what refrigerant or parts availability looks like, and whether the failure is isolated or a symptom of the system aging out everywhere at once.

A furnace in the 15-20 year range with a cracked heat exchanger is a safety replacement, not a repair conversation — full stop. On cooling, if your AC still runs on R-22 refrigerant (phased out for new production), even a straightforward leak repair can get expensive because the refrigerant itself is scarce and costly. A same-age R-410A system with one clean, findable leak is a much easier repair call.

One weak capacitor in ten years is a repair. A third service call in eighteen months on the same unit is a pattern — you're paying for the same underlying wear each time, and a replacement usually pays for itself faster than you'd expect once you add up the visits.

We hunt root cause first — airflow restrictions, weak electrical components, refrigerant leaks — before recommending a box swap. If we tell you to replace, you'll get the reasoning in plain language: safety, reliability, efficiency, or the math on repeat repairs. If a repair genuinely makes more sense, we'll say that instead, even though it's the smaller invoice.

Whichever way you land, get a written scope before work starts — what's being replaced, what's included, and what the warranty covers. That's true whether you call us or anyone else in Markham, Richmond Hill, Newmarket, or Barrie; a company that won't put it on paper is telling you something.