[hkkc]

In my 2014 F30 328i the A/C on the passenger side and the back is not cold enough, but is cold on the driver's side. I have tried turning the central button all the way to the blue. When I used the auto and manual A/C setting there is the same issue. I set the same temperature on both sides. There is also no air coming out of the back vent. How can I fix it?

[Revoltos]

Sounds like you have 1 maybe 2 lazy actuators in the IHKA (HVAC) unit. You need either ISTA or a decent scan tool that can operate each individual actuator and confirm their position to determine which one's are responding.

[DADPAID]

Originally Posted by hkkc

In my 2014 F30 328i the A/C on the passenger side and the back is not cold enough, but is cold on the driver's side. I have tried turning the central button all the way to the blue. When I used the auto and manual A/C setting there is the same issue. I set the same temperature on both sides. There is also no air coming out of the back vent. How can I fix it?

recharge your system with refrigerant. had the same problem out of nowhere several weeks back on my '15 335i. picked up a recharge kit from the parts store and it blows ice cold again. there's a lot of talk online about overcharging the system because apparently our cars use a variable displacement a/c compressor, but if you follow the directions well and stop to check the pressure every 10-15 seconds you'll be just fine.