My grandma’s furnace has been around for the longest time I can remember.
I found it working over 30 years ago.
Unfortunately, the furnace in my own house seems to be failing on me, considering that the exchanger broke, yet it is relatively new. What could be the reason behind this, yet I expected it to serve me as long as my grandma’s did? A bit of research on this subject leads me to some interesting findings. It turns out that the heat exchanger may have broken for various reasons. One of the main issues might have been dirty filters. I am guilty of leaving my furnace filters unchanged for years because I did not remember replacing them at any point. It is possible that they clogged over time and, as such, hindered free airflow. Consequently, this may have triggered overheating, which then caused the exchanger to crack. My HVAC technician confirmed this and advised that I should replace the filters every month to be on the safe side. Other reasons that may also trigger exchanger problems include an oversized furnace. This means that the furnace is likely to heat the house too fast, starting the thermostat, which then shuts down. Frequent furnace cycles caused by large or insufficient furnace sizes may lead to expansion and contraction of the heat exchanger, which stresses the exchanger, causing it to crack. The heat exchanger should be treated carefully, considering its importance to the heating process. Without it, the furnace is practically useless. Talk to the furnace repair experts if the exchanger cracks. They are likely to advise you on better management and care.