Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > X Series > X5 E70 (2007 - 2013)

X5 E70 (2007 - 2013)
E70 BMW X5 produced between 2007 and 2013. Discuss the E70 X5 with other BMW owners here.

Reply
 
Thread Tools Display Modes
  #1  
Old 05-30-2017, 05:30 AM
RAD2009 RAD2009 is offline
Registered User
Location: 24060
 
Join Date: May 2017
Posts: 1
Mein Auto: 2009 X5 E70
A/C Compressor Clutch E70

Hello,
The AC on my 2009 X5 E70 stopped working, getting code A72F - Compressor Clutch [Junction-Box Electronics] and can see the clutch is not engaging. Gas [freon] gauge indicates the system is full but no cold air; if anything, the blown air is warmer than ambient when AC is on. All AC fuses are good....is there a relay somewhere that I'm missing? Any help is appreciated, getting into the 80s soon. Thx.
Reply With Quote
Advertisement
  #2  
Old 05-30-2017, 07:18 AM
Doug Huffman's Avatar
Doug Huffman Doug Huffman is online now
Nuclear engineer
Location: Washington Island, Wisconsin, thru Death's Door
 
Join Date: Apr 2015
Posts: 4,424
Mein Auto: 2012 Feb 11 X5 35d (E70)
The ECU must enable the AC clutch. IIRC the motor must be able to support additional torque >20 Nm and up to 30 Nm. (Torque times angle rate is power)

Pressure in a static AC system is the saturation pressure for temperature for the refrigerant and nearly meaningless. Pressures in an operating AC are guidelines to an experienced technician.

The BMW IHKA HVAC is a hot water controlled system. There is a cold start interlock that warms HVAC air until stable temperatures are established. The BMW IHKA HVAC technical description is in the E70 knowledge base sticky. It's 70 pages long.
__________________
I am responsible for what I write, not for your understanding of it.
Reply With Quote
Reply

See More Related BMW Stories

Tags
a72f, compressor clutch, e70


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > X Series > X5 E70 (2007 - 2013)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 02:13 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
© 2001-2015 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms