My wife drives a 2009 escape the ac was working fine untill a couple days ago. The compresser turns on but inside the car when you turn the *** from 1 to 4 nothing at any speed. But she will hit a bump in road and fan comes on.

 

either there is a bad connection in the blower motor wiring circuit or the brushes in the blower motor are worn. the latter would require blower motor replacement.

 

Agreed.!!