Furnaces get replaced for many reasons but one reason among them all takes the lead by far! The biggest reason why a natural gas or propane furnace has to be replaced is because of a cracked or compromised primary or secondary heat exchanger. Because replacing the heat exchanger is very expensive, most people opt for furnace replacement and get a whole new unit. In this video I take a closer look at the primary and secondary heat exchanger, explain how they work, and point out common failure points.

Videos Mentioned and Others:

Video Where I Use Inspection Camera:
   • Furnace Overheating  10 Reasons Why  
Gas and CO Leaks Video:
   • A Gas Leak Could Literally Blow Your ...  
How to Check Carbon Monoxide Levels:
   • Furnace Carbon Monoxide Test  
When Should HVAC Units Be Replaced:
   • When Should Air Conditioner or Furnac...  
Should You Get a Furnace Inspection:
   • What Happens if You Don't Get Your Fu...  
What Is The Best HVAC Brand:
   • Best HVAC Air Conditioner Brand To Buy  
Why Not To Buy a High Efficiency Furnace:
   • Don't Buy a High Efficiency Furnace!  
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Check out these playlists for more repair videos:
   • Dryer Playlist  
   • Washer Playlist  
   • Furnace Playlist  
❄    • Air Conditioner Playlist  
   • Water Heater Playlist  
   • HVAC Tools  
   • Capacitor Playlist  
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⚠ Disclaimer:
This video is for educational purposes. All appliance and HVAC repair work should be done by a trained professional. Word of Advice TV is not responsible for any possible damages or injuries caused by the use or misuse of the provided information.
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