What are the signs my furnace needs replacement

Your furnace likely needs replacement if it's over 15-20 years old and showing multiple warning signs, or if repair costs exceed 50% of replacement value. The most critical indicators are frequent breakdowns, rising energy bills, and uneven heating throughout your home.

Age is the primary factor - furnaces typically last 15-20 years with proper maintenance. If your unit is approaching or exceeding this range, replacement becomes more cost-effective than ongoing repairs. In Ottawa's harsh winters, an aging furnace works harder and is more prone to failure when you need it most.

Performance issues signal declining efficiency and reliability. Watch for rooms that won't heat properly, the furnace cycling on and off frequently, or taking longer to reach set temperatures. Strange noises like banging, rattling, or squealing often indicate worn components that are expensive to replace. Yellow flames instead of blue flames on gas furnaces can signal dangerous combustion problems requiring immediate attention.

Rising energy costs are a clear indicator of declining efficiency. If your Enbridge bills have increased significantly without changes in usage, your furnace is likely working harder to produce the same heat. Modern high-efficiency furnaces (96%+ AFUE) can reduce heating costs by 20-40% compared to older units.

Safety concerns should never be ignored. Rust around the furnace, especially near the vent pipe, can indicate dangerous carbon monoxide leaks. Frequent headaches, flu-like symptoms, or your carbon monoxide detector activating are serious warning signs. Any gas odors or visible corrosion require immediate professional inspection.

In Ottawa's market, mid-efficiency furnace replacement typically runs $3,500-$5,000, while high-efficiency units cost $4,500-$6,500 installed. TSSA permits and professional installation by licensed G2/G3 technicians are required for all furnace replacements in Ontario.

If you're experiencing multiple warning signs or your furnace is over 15 years old, schedule a professional assessment to evaluate repair versus replacement costs. For a free estimate on furnace replacement, request a quote from Ottawa HVAC Pro.

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