2002 durango ,i was trouble with switching from defrost and temp control,well i figured out there is different little motors that controls each one of the above problems ,i took the motors off and there is power to them and they work but only turn in one direction,so i put them in a position and bolt the motors back on as soon as you turn the controls they max out in one direction and qiut moving ,can you help me out anybody

 

check all the electrical connections, especially the ones going into the hvac control unit

 

Did you hook up a scanner and see if you have codes for the blend doors?

 

I check all connections and I even change the whole control unit,I took off two of the blend motors,the one that changes the temp,and the one that switches from defrost to floor and other positions,when i had them off i turned the controls they only turn one direction.