In my electric Coleman furnace I can see the orange glow at the bottom... The motor is moving.. I can see it in the squirrel box up top. But the heat is sitting in the vents and not blowing anywhere... What part should I go buy? It's a newer furnace but I have no manual with it.

If the motor is moving the correct amount of air there should be no problems
Check to make sure all return vents are open.
Check air filter and replace if dirty.
Make sure both supply and returns are open.

Your blower motor might not be operating correctly causing the problem