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First change heater cores (archive)
[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Posted by Patrick C 88 750iL on April 08, 2002 at 18:35:56:

In Reply to: AC problem both cool and hot air come out !! posted by Steve on April 07, 2002 at 11:20:43:

There are two heater cores that can be changed out for some $20 ea. If you have not changed them before, there is a good chance this will fix the hot air problem. On my 88 750, after i changed out the heater core I still found if I turned off AC and just blow cold outside air, the right side defroster will still get pretty hot. However, if I then hit the AC switch to turn it on, the heat disappear. The AC circuitry probably sends an electric signal to the right side heater core to correct the condition.
Patrick C 88 750il


I have a 90 750iL . When I turn the AC on some of the vents blow cold AC air while a couple blow very hot air like the heater was on. I suspect some redirection of the air but don't know where to start to look for the problem. Any help would be appreciated.Thanks




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