A failing furnace can leave homeowners wondering whether they should repair it or replace it entirely. With fluctuating winter temperatures across Surrey, Delta, Langley, and New Westminster, choosing the right option can directly impact your energy bills, comfort, and long-term expenses.

Both repair and replacement have benefits, but the best choice depends on your furnace’s age, performance, efficiency, and repair history. This guide breaks down the hidden costs, savings, and long-term outcomes so you can make a confident decision.

When Furnace Repair Makes More Sense

Furnace repair is often the most cost-effective choice when the issue is minor, and the system still has several good years left.

Repair is the better option when:

1. Your furnace is under 10 years old

Modern systems typically last 15–20 years. If yours is still relatively new, repairs are usually affordable and efficient.

2. The repair cost is less than 25% of the replacement cost

Minor issues—like ignition failures, sensors, motors, or thermostat problems- often cost far less than installing a new system.

3. Your energy bills haven’t increased

Stable monthly energy costs mean your furnace is still operating efficiently enough to justify repair.

4. The furnace has not required frequent repair

If this is your first breakdown in several years, repair is usually the smarter option.

5. You plan to replace it later, but not immediately

Repair can serve as a bridge solution until you’re ready to invest in a high-efficiency system or take advantage of seasonal rebates.

 When Furnace Installation Saves You More in the Long Run

A new furnace provides significant long-term benefits, especially if your current system is old, inefficient, or requires frequent repairs.

You’ll save more with furnace installation when:

1. Your furnace is 15+ years old

Older furnaces lose efficiency and cost more to operate, especially during BC winters. Replacing them can reduce energy bills by 20–30%.

2. Repairs are becoming frequent and expensive

Multiple breakdowns per year signal that the system is reaching the end of its lifespan. A new unit eliminates ongoing repair costs.

3. Your energy bills continue to rise

Declining efficiency means your furnace is working harder to heat your home. Installation of a high-efficiency unit offers immediate savings.

4. Your home has inconsistent heat

Uneven heating or cold spots indicate failing components or an outdated unit.

5. You qualify for rebates in BC

Through CleanBC and FortisBC, homeowners may receive rebates for upgrading to high-efficiency or heat pump systems, reducing upfront costs significantly.

6. You’re planning to stay in the home long-term

Installation typically pays for itself through lower bills, fewer repairs, and improved comfort over 10–15 years.

Repair vs Installation: Cost Comparison

Factor	Repair	Installation
Upfront cost	Low	Higher
Long-term cost	Higher if repairs continue	Lower due to efficiency
Efficiency	Unchanged	Much higher
Energy bills	Same	Reduced 20–30%
Reliability	Uncertain	Very reliable
Rebates	Not available	Available in BC
Best for	Newer furnaces	Older or inefficient furnaces

The 50% Rule (Expert HVAC Tip)

If the repair cost is 50% or more of a new furnace, replacement almost always saves you more money, especially if the furnace is older than 12 years.

Which Saves You More?

✔ Repair saves more

When the furnace is newer, the issue is small, and costs are low.

✔ Installation saves more

When the furnace is old, inefficient, unreliable, or costly to maintain.

Need Help Deciding? Get a Professional Furnace Assessment Today

Guru Service Group provides fast, honest furnace repair and installation services across Surrey, Delta, Langley, New Westminster, and the entire Lower Mainland.

Book an appointment or request 24/7 emergency service.

Frequently Asked Questions