I have a Magic Chef furnace model # G76-125D2C3-1, serial # A 02693JAB. This model was recently removed from a house and I'm installing it in my garage. Whoever removed it made a mess of the wiring, but I think I'm close to getting it working correctly. The problem I'm having is the fan won't stay running to cool the unit down. Any help would be nice, a wiring diagram or manual would be real nice, TIA.