Question about 1999 BMW 7 Series

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Air conditioning and heating all of a sudden decided to fail. model 728i, 1999 bmw

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If everything has stopped working ie. blower,you can't change the vents, a/c compressor won't come on, then I would look at the control head, If the vents still change, then I would check the fuses,( it's a 30 amp) for the blower, If that is good. the resitor may be bad, some times the blower will work on high only, this will tell you that it's the resistor, If ithe blower doesn't work on any setting then it could be the the blower.
If you are going to try this yourself, let me know and I can guide you thru it and check to see which part is bad. you will need an ohm meter

Posted on Nov 10, 2010


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