A/C stopped when blower motor changed
My manufactured home has central heating/cooling with a Nordyne/Intertherm model MGHA-056ABFC-05. I just changed the blower motor, replacing the GE motor with a matching Dayton motor. All the wiring (red, black, white, blue) seems to be identical. The blower is working fine, but now the A/C unit behind the home has stopped working. What is the blue wire for? I do not believe that it was connected to anything on the old one, and I do not see what it might possibly connect to within the wiring box. Wiring diagrams on motor and on front panel of unit indicate that blue is for "medium."
The unit outside does absolutely nothing, as if it were a fuse. The blue line coming from the blower motor is a hot wire, and I was wondering whether it could be power supply. I also wondered whether the problem may relate to the ventilator switch, which has 3 settings(on, off and fan)