Loading content...
When your furnace breaks down, the big question is whether to repair or replace. A repair may cost a few hundred dollars, but if your furnace is aging or inefficient, replacement could save thousands over time. This guide helps you make the right call.
| Metric | Furnace Repair | Furnace Replacement |
|---|---|---|
| Average Cost | $150 - $600 per repair | $3,500 - $7,000 installed |
| Decision Threshold | Furnace under 15 years old | Furnace over 15-20 years old |
| Energy Savings | None (same old efficiency) | 20-40% reduction in heating costs |
| Warranty | Repair warranty (90 days - 1 year) | 10-year parts, 20-year heat exchanger |
| Best For | Minor issues on newer furnaces | Old, inefficient, or frequently failing furnaces |
| Timeline | Same-day to 2 days | 1-3 days for full installation |
Use the "50% rule" — if the repair costs more than 50% of a new furnace and your unit is over 15 years old, replace it. For furnaces under 10 years old with minor issues (igniter, blower motor, thermostat), repair is almost always the right call. Between 10-15 years, weigh repair frequency: if you have repaired it more than twice in the last two years, replacement is usually smarter long-term.
Most gas furnaces last 15-20 years with proper maintenance. High-efficiency models may last slightly longer. If your furnace is approaching 15 years and needs a major repair, it is usually more economical to invest in a replacement.
Warning signs include: frequent repairs (2+ per year), uneven heating, rising energy bills despite maintenance, unusual noises or smells, yellow pilot light (carbon monoxide risk), and the unit being over 15 years old. A professional inspection can confirm whether repair or replacement is the better investment.
Yes. The Enbridge Home Efficiency Rebate program offers rebates for upgrading to high-efficiency furnaces. The Canada Greener Homes Grant may also apply. Requirements include a pre- and post-retrofit EnerGuide home evaluation. Check current program details as amounts change annually.
Find licensed contractors in your area who can help you choose between furnace repair and furnace replacement.
Get Free Quotes