I wonder how did I not know about this?

The website www.ismyfurnacesafe.com gives all of the details of the defective furnaces. As quoted from the site:

“According to the findings in two class action lawsuits, more than 49 brands of furnaces produced prior to 2001 may contain faulty parts. Often, these furnaces will operate for years without a problem. Yet they still remain a possible fire and/or carbon monoxide risk. (more…)