Furnace Repair or Replace? A Coquitlam Homeowner's Guide (2026)

When your furnace quits on a cold November night, the first question is simple: fix it or replace it? The answer depends on the furnace's age, what broke, what the repair costs compared with a new system, and whether there is any safety risk. This guide walks Coquitlam homeowners through each of those points, using published cost guides and official safety and permit rules. All figures were checked on October 7, 2026.

How long does a furnace last?

A 2026 Canadian cost guide from Reno Quotes says most furnaces last 15 to 20 years with proper maintenance, and some well-maintained gas units reach 25. Age alone does not mean you must replace a furnace. But as a furnace gets older, parts get harder to find, repairs come more often, and it is likely less efficient than a new model.

To find your furnace's age, look for the manufacture date on the rating plate inside the cabinet door, or ask your technician at the next service visit.

How much does furnace repair cost in Metro Vancouver?

We could not find a published, dated repair price list just for Metro Vancouver. The figures below are Canada-wide reported ranges from the HomeStars furnace repair cost guide (updated August 21, 2026). HomeStars notes that Vancouver has higher labour rates than smaller markets, which can add about $100 to $200 to mid-range repairs.

Repair (gas furnace)	Reported range (Canada, 2026)
Diagnostic / service call	$80 to $150
Flame sensor	$75 to $200
Ignitor	$150 to $300
Gas valve	$300 to $700
Blower motor	$300 to $650
Control board	$400 to $900
Draft inducer motor	$700 to $1,500 or more
Heat exchanger repair or replacement	$500 to $1,500+ (see note)
After-hours / emergency surcharge	add $100 to $200

HomeStars puts the overall range at about $150 to $1,500, with most single-part repairs during business hours at about $200 to $600. Note that HomeStars' own replacement cost guide gives a different figure for heat exchanger work ($1,500 to $2,500), so treat that line as a rough guide only.

These are estimates, not quotes. Prices vary by home, furnace model and contractor. Get at least two written quotes.

How much does a new furnace cost?

High-efficiency gas furnace

Two 2026 Canadian cost guides report similar ranges for a new gas furnace, installed:

• HomeStars (updated August 21, 2026): about $4,000 to $6,750+ for a high-efficiency furnace, with an average range of $4,000 to $6,750 and a broader range of $4,000 to $7,500.
• Reno Quotes (updated September 18, 2026): about $4,000 to $7,000 for a typical natural gas furnace, and $3,500 to $10,000 across Canada overall.

Extra work can raise the total. HomeStars reports that adjusting or upgrading ductwork can add about $1,000 to $5,000 or more. Venting changes, a new thermostat or electrical work may also add cost. Neither guide gives a BC-only figure, and Metro Vancouver labour tends to cost more than the national average.

Heat pump or dual-fuel instead?

Replacing a furnace is a good time to look at a heat pump. Green Building Canada collected quotes from BC heat pump buyers and reports about $17,796 to $27,490 before rebates for a ducted air-source heat pump, depending on size (2.5 to 5 tons; data updated July 3, 2025). A dual-fuel system pairs a heat pump with a gas furnace for backup on the coldest days. Rebates can change the math a lot. For a side-by-side look at the three options, read Heat pump vs dual fuel vs gas furnace in BC.

Should I repair or replace my furnace? A simple decision rule

There is no single right answer, but this step-by-step check covers most cases. The age bands and the 50% rule below follow the guidance in the HomeStars repair cost guide.

1. Is there a safety problem? A cracked heat exchanger, a carbon monoxide alarm, or signs of poor venting come first. Stop using the furnace and call a licensed gas contractor. HomeStars treats a cracked heat exchanger as a reason to replace, whatever the age.
2. Is the furnace under about 10 years old? A single failed part is usually worth repairing.
3. Is it about 10 to 15 years old? Use the 50% rule: if the repair costs less than half of a new furnace, repair is usually reasonable. If it costs more, get a replacement quote too.
4. Is it over 15 years old? Lean toward replacement for any large repair, especially if parts are discontinued (for example, a control board that is no longer made).
5. Is it breaking down often? Add up the last two or three years of repair bills. Several repairs in a row on an older furnace often point to replacement.

This is general information, not financial advice. Your contractor can explain the condition of your specific furnace.

Cracked heat exchanger and carbon monoxide: when it is not a money question

The heat exchanger keeps burning gas and its exhaust separate from the air that flows through your home. If it cracks, exhaust can get into your living space. Technical Safety BC investigated a 2017 case in Sparwood where a furnace heat exchanger had a hole and the vent piping had come loose. A technician measured 500 ppm of carbon monoxide at the front door, and one person went to hospital.

What official sources say to do:

• Have a CO alarm. Health Canada says carbon monoxide can only be detected with a CO alarm. FortisBC's safety sheet suggests looking for a CSA-approved alarm, and notes that alarms do not replace regular inspection.
• Leave if the alarm sounds. Health Canada says to leave right away, get to fresh air and call emergency services.
• Get yearly service. Health Canada advises having fuel-burning appliances serviced every year.
• Know the warning signs. FortisBC's appliance safety sheet lists a yellow or wavering flame, scorch marks near the furnace door, soot or white, brown or black streaks on the vent, and too much or too little heat. If you smell rotten eggs or sulphur, stop what you are doing, go outside, and call 911 or FortisBC's 24-hour emergency line.

Never try to repair a heat exchanger, gas valve, burner or vent yourself. Gas work in BC must be done by a licensed contractor under a permit.

What efficiency does a new furnace need in Canada?

Under federal Energy Efficiency Regulations (Natural Resources Canada page updated November 6, 2025), a standard gas furnace with an input of up to 65.92 kW must have an AFUE of at least 95% if it was manufactured on or after July 3, 2019. AFUE (annual fuel utilization efficiency) is the share of fuel that turns into usable heat over a season. A few special types, such as some space-constrained models and furnaces for relocatable buildings, have lower minimums.

What this means for you: a new gas furnace for a typical house will be a high-efficiency, condensing model. If your old furnace is a lower-efficiency unit, the new one may need different venting and a condensate drain, which your contractor should include in the quote.

What rebates can I get?

Rebates in BC mostly target heat pumps and dual-fuel systems, and amounts and rules change often. Rather than repeat figures here that may go out of date, see our BC heat pump rebates 2026 guide. Always confirm the current terms on the official program page before you buy, because many programs require pre-approval or a registered contractor.

Do I need a permit to replace a furnace in Coquitlam?

Yes. Technical Safety BC says a gas permit is needed to install or replace gas appliances such as a furnace. Its July 2025 bulletin says permits are required before starting any alteration work on gas equipment, including replacements and removals. Licensed contractors who work without a permit can face enforcement.

• The City of Coquitlam does not issue gas permits; it points residents to Technical Safety BC.
• When you hire a licensed contractor, the contractor applies for the permit on your behalf.
• Technical Safety BC says strata owners cannot get homeowner gas permits and must use a licensed contractor.
• If you switch from a gas furnace to an all-electric heat pump, the gas side still needs to be safely shut off and capped under a permit.

Ask your contractor for the permit number and keep it with your home records.

Furnace maintenance tips that help it last

• Book a yearly service with a Technical Safety BC licensed gas contractor, as Health Canada and FortisBC recommend.
• Check the filter about every three to six months, and more often with pets or smokers, as FortisBC suggests. Replace it if needed.
• Keep the area clear. FortisBC advises keeping laundry, paper, paint, solvents and propane cylinders away from gas appliances and vent pipes.
• Keep outside vents clear of leaves and debris so the furnace gets fresh air.
• Keep the fan compartment door and filter panel in place when the furnace runs.
• Test your CO alarm regularly and replace it when the maker says to.

How to get fair furnace quotes

• Get at least two or three written quotes for the same scope of work.
• Ask for an itemized quote: equipment model and AFUE, labour, venting, ductwork, thermostat, removal of the old unit, and the permit.
• Ask for a repair quote and a replacement quote on an older furnace, so you can apply the 50% rule yourself.
• Ask about sizing. A good installer should size the furnace for your home, not just copy the old unit.
• Check the licence. Confirm the company is licensed with Technical Safety BC. Our guide on how to check a gas fitter licence in BC shows you how.
• Compare warranties on both parts and labour, and get them in writing.
• Be careful with pressure. If someone says your furnace is unsafe, ask them to show you the problem and put it in writing. A second opinion is reasonable unless there is an active gas or CO hazard.

FAQ

Is it worth repairing a 20-year-old furnace?

For a small, cheap fix like a flame sensor, it can be. For a large repair, replacement is often the better value at that age, according to the HomeStars guidance. Any heat exchanger crack or CO concern means replacement, not repair.

Can I still buy a mid-efficiency gas furnace?

For most homes, no. Standard gas furnaces made on or after July 3, 2019 must meet a 95% AFUE minimum under federal rules. A few special categories have lower minimums.

How long does furnace replacement take?

We did not find an official source on install time. Ask each contractor for a schedule in writing, including the permit and inspection steps.

Does my contractor need a permit for a like-for-like furnace swap?

Yes. Technical Safety BC requires a permit for replacing gas appliances, including furnaces.

Should I switch to a heat pump instead?

It depends on your home, ductwork, electrical panel and the rebates you qualify for. See our heat pump vs dual fuel vs gas furnace comparison and the BC heat pump rebates guide.

Before you hire

• Confirm the company holds a current Technical Safety BC gas contractor licence.
• Get at least two written, itemized quotes for the same scope.
• Confirm who pulls the gas permit and ask for the permit number.
• Check the AFUE rating and model number of the furnace being quoted.
• Ask what venting, ductwork or electrical changes are included.
• Get the parts and labour warranty in writing.
• If you are thinking about a heat pump, check rebate rules before you sign anything.
• Make sure you have a working CO alarm before and after the work.

To compare local companies, see our ranked lists of HVAC contractors in Coquitlam and gas fitters in Coquitlam, and read how we rank.