I wrote a series on these, each part of which can be found below:

   

pt.1: What is a Warranty? 

pt.2: Which Law Governs Warranties? 

pt.3: The Express Warranty

pt.4: Implied Warranty #1

pt.5: Implied Warranty #2

pt.6: Full and Extended Warranties

pt.7: The Limited Warranty

pt.8: The Caveats (the “bewares”) 

pt.9: Used and “ As Is” Sales 

pt.10: Who is Responsible?

pt.11: How Warranties Work: Who is Responsible? The Installer? The Shipper?