BimmerFest BMW Forum banner
1 - 10 of 10 Posts

·
Registered
Joined
·
15,837 Posts
Discussion Starter · #1 · (Edited)
It’s a ’97 540i. The IHKA “Auto” seems not to work; just a whisper of heat, and blower does not run. I can control the blower speed at the panel, and heat comes out, so I assume that the FSU is OK.

The outside temp reading is correct.

Any opinions that the IHKA control panel is faulty? I have not read a symptom like this.
 

·
Registered
Joined
·
6,693 Posts
Probably not related, have you ever taken the HVAC panel out to clean the fan and dust around the internal temp sensor?
How about a system reset by disconnecting the battery?
 

·
Registered
Joined
·
2,831 Posts
Worth a try. The ihka panel slides off, be careful with the plastic retainers, the fan lifts right off, its on a magnet, vacuum the sensor, put a drop of oil on the magnet spindle, put magnet back on.
 

·
Registered
Joined
·
15,837 Posts
Discussion Starter · #9 · (Edited)
Have not yet done that. Thanks for the link.

I have never read about this symptom, so I decided to throw it against to wall to see if it stuck before I rip it apart.

The guy in the video must have long-haired cats!
 
1 - 10 of 10 Posts
Top