[edjack]

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.

 

[JimLev]

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?

 

[edjack]

Interesting points.

 

[528iAut]

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.

 

[taz.]

I posted a video on your thread on the other forum for reference for the same tip.

Sent from my SM-G986B using Tapatalk

 

[mattmar1]

any codes and their definitions?

 

[edjack]

I only have a generic scan tool.

 

[taz.]

I only have a generic scan tool.

Did you check the video that I posted for you, cleaned the panel and had no results?

Sent from my SM-G986B using Tapatalk

 

[edjack]

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!

 

[crazy4trains]

any codes and their definitions?

LOL