2003 bmw 325i, the air is working, but two of the vents are blowing hot air. the other two are fine. what could it be?
Apparently they didn't look for a vacuum leak or check the blend doors.
what are blend doors? sorry i have no knowledge when it comes to cars.
Make sure your center vent dial is set on the blue dots for cold air. I know it seems obvious, but lots of people overlook this simple function on the E46 and other similar BMW cars since the settings are not electronically indicated on the Climate Control Read Out Display. In fact, you can have your Climate Control set to blow cold air (or even hot air during the winter months), but the setting on this dial takes precedence and the air coming out the vents WILL ALWAYS match what the dial is set on whether it be red dots to blow hot air or blue dots to blow cool air.
Tom is correct check you stratification wheel and make sure it is on the blue dots. If thats ok and your a/c system is full of freon then you should check you water valve. This vehicle does not use a mixer flap in the air box to control the temperature it uses a water valve on the driver side near the air box, If that valve is stuck open then you will have heat coming in the passenger compartment even when the a/c is on. Hope this helps.
I have the same problem. The center vents are putting hot air after a while? Is there a temp sensor/thermal stat some where that may not working properly? HELP!!!!
Looking for a Used 3 Series in your area?
CarGurus has 40,968 nationwide 3 Series listings starting at $1,350.
Search BMW 3 Series Questions
BMW 3 Series Experts