We are replacing a builder-grade Rheem furnace that is 20 years old. How do I go about finding the best furnace with the best repair record?
There is no sure-fire way to guarantee that whatever you buy will be problem-free. You can do the Internet research then comparison-shop, and ask your friends and relatives for recommendations.
The only thing consumers have going for them is the warranty and whether the manufacturer or installer will adhere to it.
You need to ask what exactly the warranty covers, how long it will be honored, and who will cover the diagnostics to determine the cause of the problem, the parts needed, and the installation charges.