The reason your A/C sent hot and dash showed -40 is because you probably lost your amibent sensor. Its a sensor that reads the tempature outside and if its cold it will not allow your a/c to work, if you force it, you'll cause far more damage then you'd like. You can go to www.bimmerspecialist.com and find an ambient sensor. Also check www.bimmerfest.com to get pictures where your amibent senor is located. Mine was in back of the front / passanger sensor, and it got ripped off as I hit something on the road. Hope this helps...
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Feb 22, 2012 - Uploaded by willnbren2
I have a question regarding my 98 528i , it will crank once but not start then I retry it won't crank but I can hear the fuel pump humming , I have to ...
is the cooling fan cutting in ? run the engine whilst stationary with the hood up , give it a little gas 2000revs and wait for the temp gauge to rise ,the cooling fan should be heard cutting in , and off again once cooled the engine temp down ,this may take 10-15 mins but you have to be sure the fan is cutting in or you may cook the engine
The air conditioner may not work properly if your ambient temp is reading -40. The a/c control unit monitors ambient temp so that it does not operate at too low outside temps. I would recommend fixing the ambient temp sensor and rechecking your a/c operation.
there can be a problem to air conditioner of the car . I guess you just have to go to the dealer or the toyota car shop for repair of the air conditioner . may be it's the fan of the air con that is not working properly. they can replace it .Because it is design to that car .
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