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?

Asked by Aug 10, 2012 at 07:00 AM about the 2003 BMW 3 Series 325i

Question type: Maintenance & Repair

we took it to a local shop and the free-on level was fine.

5 Answers

228,735

Apparently they didn't look for a vacuum leak or check the blend doors.

2 out of 2 people think this is helpful.

what are blend doors? sorry i have no knowledge when it comes to cars.

228,735

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.

4 out of 4 people think this is helpful.
4,395

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.

4 out of 4 people think this is helpful.
10

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!!!!

1 out of 1 people think this is helpful.

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