BMW Climate Control Failure – 2 Hours
A BMW climate control failure will cause several obvious symptoms including the inability to change the vent settings in the vehicle’s iDrive screen.
We recently encountered an interesting (actually it was annoying) situation here at the Repair Guide involving our 2005 645ci. Every time we tried to change the vent settings in the iDrive unit, they would immediately revert back to their default levels. Simply put, we could not change the temperature in the car. We also noticed that every time we started the vehicle, the air conditioning fan speed would go to “full power” (for you non sci-fi fans, that’s a Star Trek term for “it’s highest level”).
After belly aching and complaining about the issue for a month (which is what BMW owners do by the way), we finally hooked up a diagnostic tool to the car and pulled the error codes for the vehicle. We were showing a 9C7B IHKA: Interior temperature sensor fan fault code. The 9C7B fault code is BMW “mumbo jumbo” meaning the fan attached to the back of the climate control unit in your dashboard is not working; simply put, this fan draws cabin air into the climate control so it can function correctly. Unfortunately after replacing the $118 fan the error code remained, and the climate control/iDrive units still malfunctioned.
After further analysis (which is a fancy word for guessing), we determined the climate control dash unit was defective. We bought a used HVAC climate control unit on Ebay for 50 bucks, hooked it up, and voilà…the HVAC system worked perfectly. No more error code, no more climate control or iDrive malfunctions. Problem solved.
Hopefully this article will save you a lot of time and money trying to solve your climate control issues. Ebay is swamped with used HVAC climate controllers (use the search term “E60 climate control unit”), most of them for under $50. The following instructions show you how to successfully install it yourself.
The least expensive route is to find a used controller on Ebay. We suggest removing your faulty controller first then matching the part # exactly. If you don’t have the part number or you want to install a new controller, use one of the following:
Tools and Supplies
- If you are removing the climate control unit from a BMW 5 series E60 (2004-2010) vehicle, please click here to read our article on removing the dashboard trim. You must remove the dashboard trim before replacing the HVAC climate control dash unit.
- If you are removing the climate control unit from a 6 series E63/E64 (2004-2010) vehicle, please click here to read our article on removing the dashboard trim. You must remove the dashboard trim before replacing the HVAC climate control dash unit.
- After completing either step 1 or step 2 above, you will now have your center dash trim (also known as the center bezel) with the HVAC climate control dash unit attached to it. Removing the HVAC dash unit from the trim is not as simple as it might seem…patience is required to avoid breaking any of the pieces.
- First, use a T10 torx T handle to remove the two torx screws anchoring the HVAC climate control dash unit to the center dash trim.
- Use a flat blade screwdriver to push in the plastic tabs of the controller to release it from the center trim. This is the part that can be frustrating…take you time. You do not want to break the plastic on the center trim.
- The HVAC climate control unit can now be removed from the dash trim. Replace with new unit and reassemble the dashboard following the above steps in reverse.
BMW Climate Control Failure Repair Finished
If you have any questions or comments, please feel free to contact us. And congratulations for Doing It Yourself!
The Repair Difficulty Level displays graphically how challenging the repair is, from easy to advanced. Easy repairs usually require very few tools, have short repair times and do not require jacking and supporting the vehicle. As the difficulty level rises, expect the repair to demand more time, specialized tools, and better understanding of mechanics to complete the job.
|Make||Body & Trim||Engine & Transmission|
|2007 BMW 525i||Base||3.0L L6 – Gas|
|2006 BMW 525i||Base||3.0L L6 – Gas|
|2005 BMW 525i||Base||2.5L L6 – Gas|
|2004 BMW 525i||Base||2.5L L6 – Gas|
|2007 BMW 525xi||Base||3.0L L6 – Gas|
|2006 BMW 525xi||Base||3.0L L6 – Gas|
|2010 BMW 528i||Base||3.0L L6 – Gas|
|2009 BMW 528i||Base||3.0L L6 – Gas|
|2008 BMW 528i||Base||3.0L L6 – Gas|
|2010 BMW 528i xDrive||Base||3.0L L6 – Gas|
|2009 BMW 528i xDrive||Base||3.0L L6 – Gas|
|2008 BMW 528xi||Base||3.0L L6 – Gas|
|2007 BMW 530i||Base||3.0L L6 – Gas|
|2006 BMW 530i||Base||3.0L L6 – Gas|
|2005 BMW 530i||Base||3.0L L6 – Gas|
|2004 BMW 530i||Base||3.0L L6 – Gas|
|2007 BMW 530xi||Base||3.0L L6 – Gas|
|2006 BMW 530xi||Base||3.0L L6 – Gas|
|2010 BMW 535i||Base||3.0L L6 – Gas|
|2009 BMW 535i||Base||3.0L L6 – Gas|
|2008 BMW 535i||Base||3.0L L6 – Gas|
|2010 BMW 535i GT||Base||3.0L L6 – Gas|
|2010 BMW 535i xDrive||Base||3.0L L6 – Gas|
|2009 BMW 535i xDrive||Base||3.0L L6 – Gas|
|2008 BMW 535xi||Base||3.0L L6 – Gas|
|2005 BMW 545i||Base||4.4L V8 – Gas|
|2004 BMW 545i||Base||4.4L V8 – Gas|
|2010 BMW 550i||Base||4.8L V8 – Gas|
|2009 BMW 550i||Base||4.8L V8 – Gas|
|2008 BMW 550i||Base||4.8L V8 – Gas|
|2007 BMW 550i||Base||4.8L V8 – Gas|
|2006 BMW 550i||Base||4.8L V8 – Gas|
|2005 BMW 645Ci||Base||4.4L V8 – Gas|
|2004 BMW 645Ci||Base||4.4L V8 – Gas|
|2010 BMW 650i||Base||4.8L V8 – Gas|
|2009 BMW 650i||Base||4.8L V8 – Gas|
|2008 BMW 650i||Base||4.8L V8 – Gas|
|2007 BMW 650i||Base||4.8L V8 – Gas|
|2006 BMW 650i||Base||4.8L V8 – Gas|