Signs your furnace needs replacement

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How Long Should a Furnace Last?

Most gas furnaces are built to last 15 to 20 years with regular maintenance. In Metro Vancouver's mild but damp climate, furnaces don't work as hard as they would in colder regions, which can help extend service life, but coastal humidity and salt air can also accelerate corrosion on cabinets, heat exchangers, and electrical components, especially in older homes on the North Shore or near the water. If your furnace is approaching or past the 15-year mark, it's worth having a licensed technician assess its condition even if it still seems to be running fine.

Age isn't the only factor. A well-maintained 12-year-old furnace may be in better shape than a neglected 8-year-old one. What matters most is the combination of age, repair history, safety condition, and how efficiently the unit is actually heating your home.

8 Signs It's Time to Replace, Not Repair

• Rising energy bills without a change in usage — older furnaces lose efficiency as components wear, forcing them to run longer to produce the same heat.
• Frequent repairs — if you've called for service more than once or twice in the past year, or a repair estimate approaches half the cost of a new furnace installation, replacement is usually the better value.
• Uneven heating or cold rooms — struggling to reach set temperature, especially in additions, upper floors, or converted basements common in older Vancouver-area homes.
• Furnace runs constantly or short-cycles — turning on and off repeatedly, or never seeming to shut off, points to a system that can no longer heat efficiently.
• Strange noises — banging, rattling, screeching, or booming sounds can indicate cracked heat exchangers, loose components, or ignition problems.
• Yellow or flickering burner flame instead of a steady blue flame — a possible sign of incomplete combustion and a carbon monoxide risk that needs immediate professional attention.
• Visible rust, cracking, or soot on or around the furnace cabinet or heat exchanger.
• Excess dust, humidity swings, or a stale smell throughout the house, which can point to a failing furnace no longer filtering or circulating air properly.

One or two of these signs might point to a repairable issue. Several appearing together, especially in a furnace over 12-15 years old, usually means replacement will save more money and hassle over time than continuing to patch an aging system.

What You Can Safely Check Yourself vs. What Needs a Licensed Technician

In British Columbia, gas furnace repair, replacement, and venting work legally must be performed by a technician licensed through Technical Safety BC. This isn't just a formality — improperly connected gas lines or venting can create carbon monoxide and fire hazards, and unpermitted work can complicate a home sale or insurance claim later. CANRO's technicians hold Technical Safety BC gas licence LGA0043870 and are Red Seal certified.

What to Expect From a Professional Furnace Assessment

When a CANRO technician evaluates whether your furnace needs repair or replacement, the visit typically includes inspecting the heat exchanger for cracks or corrosion, testing burner flame quality and combustion, checking the blower motor and electrical connections, verifying proper venting and gas pressure, and reviewing your furnace's age, repair history, and manufacturer part availability.

You'll get an honest recommendation and upfront pricing before any work begins — if repair is the more sensible option, that's what we'll suggest. If replacement makes more sense, we'll walk through sizing and equipment options for your home rather than pushing a one-size-fits-all system.

What Furnace Replacement Involves and What It Costs

Furnace installation in Metro Vancouver typically runs $4,500 to $9,500 or more, installed. The exact price depends on the furnace size needed for your home's square footage, whether existing ductwork and venting can be reused or need modification, permit requirements, and the efficiency tier you choose. Homes with older ductwork, condos with restricted venting options, or homes switching fuel types will generally cost more due to extra labour and materials.

Any furnace replacement in BC requires a permit and inspection through Technical Safety BC. A licensed contractor pulls the permit and coordinates the inspection as part of the installation — this protects you if there's ever a warranty claim, insurance issue, or future home sale. Because every home is different, the most accurate way to know your cost is a free written quote based on an in-person or virtual assessment.

Rebates and Financing for a New Furnace

If you're upgrading from a furnace to a heat pump, or replacing an oil furnace, you may qualify for support through the interest-free Canada Greener Homes Loan (up to $40,000) or the Oil to Heat Pump Affordability (OHPA) program. CleanBC, BC Hydro, and FortisBC also offer rebates on qualifying high-efficiency equipment, though program details and amounts change periodically, so it's worth confirming current figures at the time of your quote rather than relying on older information. Note that the original Canada Greener Homes Grant closed to new applicants in early 2024 and is no longer available.

Frequently asked questions

Reviewed by the CANRO Heating & Cooling service team — July 09, 2026. CANRO holds Technical Safety BC gas licence LGA0043870 and boiler licence LBP0046450, employs Red Seal certified technicians, and carries WorkSafeBC and liability insurance. 4.9★ from 85+ Google reviews · serving Metro Vancouver since 1999 · (604) 359-1081 · info@canroheat.ca.