My A/C only blows cold on drivers side

[fusion27]

Can someone tell me why my 1995 740i only blows out cold on the drivers side and warm on the pass side? this happens when i put the a/c on, thanks.

[3100]

The problem could be with the IHKA control module or steeper motors. I would dig into dashboard and fallow duct-work see what motors are controlling what duct-work doors and start from there.

[rbarracuda]

Yeah more than likely one of the step motors is not working, pull the dash apart, the heater controls have about 5 step motors, they are easy to test I suggest getting manual at local automotive store and reading about them. My 735Il does same thing, but will blow hot air for a minute and cold air out the other side. I have a bad step motor but have not replaced it yet. You can buy them after market on the web pretty easily about $20

[lincolnmaster80]

Could also be the mixing flaps, they are know to break and/or get stuck in one position.