5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
I have a 97 528. The car runs amazing. The only problem is that the a/c is intermittent. There are times when it is ice cold. It seems that when I need it the mos it only gets Luke-warm. Also there are times when the fan speed will not increase regardless of the fan setting. Am I looking at 2diferent problems? I have had the system completely evacuated and recharged with fresh freon by my general mechanic. There is no reason why it shouldn't be working. The clutch cycles fine. It is holding pressure...
I need some help, summer temps are already killing me.
The fan speed is controled by the blower motor. If the fan is not increasing in speed when you select a higher setting then the motor, or the blower motor resistor may be failing. As for the lukewarm/cold issue, make sure your coolant level is topped up, and that all air is bleed from the system. An airbubble in the system can cause that. The coolant also feeds into the heater core.
Also, for the lukewarm A.C. Does it happen when sitting at a stop but then cools down more while the vehicle is moving? Check to make sure that your auxillary cooling fan is running when the A.C is on. If the fan is not working then this can give you these symptoms. DIY: Aux Fan Replacement DIY - Bimmerfest - BMW Forums
Best of Luck,
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