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-   -   AC Warm until rasing RPM's (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/98070-ac-warm-until-rasing-rpms.html)

flybye 08-25-2014 04:17 PM
AC Warm until rasing RPM's
 
So my A/c blows warm air until I raise the RPM.
Where should I start?

lhordmclain 08-25-2014 04:40 PM
my 2 cents

- Check the low side and high side pressures
- Find leaks, put UV DYE (inspect exterior and perform internal scope to check evaporator core)


EDIT:
Added a link: Troubleshoot Automotive Air Conditioning Problems

ants_oz 08-25-2014 05:47 PM
Check that the electric fan is engaging when aircon is activated. Condensor will not work efficiently without sufficient airflow, and raising RPM's will increase airflow by increasing the speed of the mechanical fan.

flybye 08-25-2014 06:48 PM
Does the fan come on as soon as the A/c button is pressed? I only hear the fan engage when the engine starts to get warm.
Thoughts?

lhordmclain 08-25-2014 07:33 PM
When I turn on my AC , the aux fan (pusher fan ) spins/turn on immediately

THE VEIN 08-26-2014 08:10 AM
You need a new compressor

lhordmclain 08-26-2014 08:43 AM
It can be one or combination of leaks, electrical, electronics ,refrigerant and etc

Before I was leaning towards the IHKA, it turned out to be the dreaded FSR


Quote:
Originally Posted by trader4 (Post 1006292)
It seems his aux fan does turn on when the car gets hot enough. For purposes of his immediate problem, he can figure out if it has anything to do with the fan by seeing what happens when the car is hot, aux fan running, car idling. If he also doesn't have cold air then, it's not the fan that's the immediate problem.

THE VEIN 08-26-2014 08:49 AM
I had the same problem and it was the ac compressor

Quicksilver 08-26-2014 12:13 PM
Why not take the guess work out of the process. Take your vehicle to a professional who has the proper gear to help you arrive at the correct diagnosis then proceed with the repair.


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