I received a faulty (gas leaking) AC unit (paid several thousands of $ to national air warehouse) and they said they only covers parts. So instead of replacing the faulty unit they gave me, I have to pay a contractor a ton of money to take apart the entire unit and replace the part inside it. When I called them, they just blamed the manufacturer and said tough luck. Basically, their warranty is not worth the piece of paper its written on. A joke. They should stand by their products and replace the whole unit with one that works and then take it up with the manufacturer. Instead, they choose to screw the customer...