Our furnace (20 years old) went fritzy and while I'm somewhat handy, the part wasn't in stock anywhere. Could have called a shop to come out (some repair shops keep the more common items on hand, but won't sell them unless they install as part of a service call, so we decided to just "chill" a few days while the part arrived. Would have been nicer if it weren't over a weekend when you're home all day, but still...we save at least $200, and that doesn't even include what we saved by not running the furnace for a few days. Luckily we live in a part of the country where it wasn't a dire issue, but low 50s in the house is still pretty chilly.
Good luck with it all, MoodyBlues.