5 Warning Signs You Need to Replace Your Furnace

In Canada, your furnace plays a critical role in keeping you warm. But how long will it last, and when should you replace it? Here are five warning signs that indicate it might be time for a new furnace.

1. Your Furnace is Old
   The average gas furnace lasts 15-20 years. If your furnace is approaching this age or older, it may be time to start planning for a replacement. Although well-maintained units can last longer, a furnace over 15 years old is likely nearing the end of its lifespan. Be sure to change filters regularly and schedule annual maintenance to prolong its efficiency.
2. Rising Repair Costs
   If your furnace requires frequent, costly repairs, it may be more cost-effective to replace it rather than continue fixing it. Repair costs can range from $100 for minor issues to $3,000 for major repairs like replacing a cracked heat exchanger. If repairs become more frequent and expensive, it’s time to replace the unit.
3. Inconsistent Heating
   If your furnace isn’t keeping your home warm or is blowing cold air, it’s a clear sign of trouble. For older units, it’s often more practical to replace the furnace rather than spend money on repairs. Additionally, hot and cold spots in your home could be caused by inefficient heating, clogged filters, or issues with your ductwork.
4. Increased Energy Bills
   An aging furnace can become less efficient, causing your heating bills to rise. If your energy costs have increased unexpectedly, and there's no change in temperature, it's time to have your furnace inspected. A new furnace will not only be more energy-efficient but will save you money on both repairs and energy bills in the long run.
5. Strange Noises or Smells
   Unusual sounds like banging, clanking, or booming could indicate mechanical issues, while a pungent smell may signal a cracked heat exchanger. A rotten egg smell could indicate a gas leak, which requires immediate attention. If you notice either of these, turn off your furnace and call the team at John’s Home Comfort Heating and Cooling.

Replacing your furnace before it completely fails will ensure your home stays warm and safe during the coldest months.