I bought a hunter 44360 digital thermostat to replace a Rudd.
The Rudd was wired Y-Yellow, G-green, E-White, R- Red, B-Blue, and a brown on X.
The Hunter has G, RC, RH, Y/O, W/B and Y1.
I can't seem to get the outside fan to run.
Also before changing the thermostat, the blower fan constantly runs.
Please help me it is over 90 degrees in the house and in the 100"s outside.

Did the fan run constantly before?

Tape off the brown, it will not be used. This thermostat does not have two stage heat, which is what you need . If you connect to this thermostat you will have no aux. heat.(electric heat)