Absolutely. Anything mechanical can break at any given time. Have you had your system serviced regularly? I'd look for a reputable contractor to service your existing 17 yr old system and to give you an opinion on it's condition. It might be in great shape...can't tell from here. At least have it checked....if it's on it's last legs they can tell you. They can also tell you how you can benefit from a new system with a greater effeciency.
Originally Posted by Otterpops
as an installer for 10+ years I would only ask that you stay away from deer season :D