seanjordan20

This is what your IHKA is supposed to look like.

Crashone

Well. This is what came with the car 8 years ago.

seanjordan20

PM me your VIN. I'll look it up to know for sure. If it's not originally what came with the car it's the reason you have that error message

Crashone

Not sure why this picture didn't post earlier. Here's the controls that came with the car.
If this wasn't supposed to be installed, why haven't I had an auxiliary pump fail code until now?
I'm wondering if the main pump is going out.

donpb

That error could be a red herring. What device are you using to read DTC codes?

Crashone

I have an Autel Bluetooth reader for BMW as well as an Icarsoft for BMW.
I do not have the big bucks for the BMW certified computer programs.

seanjordan20

Looking at your VIN you have option code S534 auto A/c dual climate so your IHKA should look like the below. Although this is not the reason why your heat is not getting hot anymore. I would say that the thermo is stuck open and you need to replace it. You can check that by looking at live data to see if the car is getting up to operating temp. If it's not its your thermo and I never replace a thermo on cars like yours without doing the pump also due to the nature of uninstalling it.

Crashone

Thanks! I'll check that out and agree about replacing pump too. I've done this job on my wife's E61 wagon last year.