When I woke this morning I discovered that my heat is not coming through the vents only cold air? What's happening?

Since you supplied so much information with your post as to what brand and model number of your furnace is I can supply the only answer I know.

Sounds to me like your furnace is not working!

Are you sure you woke up in the right house? :confused:

Sorry, couldn't resist! Give more information on what you have, how old, model numbers and I'm sure someone here could help.