Furnace Repair vs. Replace: How to Decide Before Winter

A cracked heat exchanger ends the conversation. It can allow combustion gases — including carbon monoxide — into household air, and replacing the exchanger on an aging furnace rarely makes financial sense versus a new unit. Demand to see evidence (camera photos, test results) if a tech condemns yours; it's also the single most abused scare-tactic in the industry. Both things are true, which is why documentation matters.

Other decision-forcers: repeated control-board failures, a failing inducer or blower motor on a 15+ year unit, and any repair approaching a third of replacement cost.

More than in most states. Central Iowa's heating season is long and cold — January lows around 14°F with genuine sub-zero stretches. Moving from an old 80% AFUE furnace to a 95%+ condensing model means roughly 15 cents more usable heat per fuel dollar, compounded over thousands of runtime hours a year. That efficiency delta is the honest core of the replacement case; it isn't hype, it's arithmetic on your fuel bill.

• The furnace is under ~12 years old and the failed part is a normal wear item (igniter, flame sensor, capacitor, pressure switch).
• The repair is small relative to the system's remaining life.
• You're planning to move soon and the system passes safety inspection.
• Budget timing genuinely matters — a safe, working repair now with a planned replacement in a year beats a rushed decision. Financing options exist for when replacement can't wait; the terms are the client's lender's, and we'll walk you through them straight.

Honestly assessed: if the furnace passed a safety inspection, the risk is inconvenience, not danger — a mid-January failure and an emergency decision. If it did NOT pass (exchanger concerns, CO readings), waiting is not an option we'll endorse. Schedule a fall inspection either way; the worst time to learn your furnace's condition is the first sub-zero night.