Climate control issue

[split71]

2011 35d, regardless if the system is in manual or auto mode, the fan only runs at a lower speed which will not increase. Sometimes after I drive 10 minutes or so, it works normally. If I put the system in defrost , the fans go on high and seems to work normally (every time).

I have no codes (Carly App) and all looks Ok. Any Ideas?

[gregg3gs]

your fan control resistor could be going bad.

[MMMGP]

Yep, agree with Greg, sounds like the FSR is bad. Common failure, Google is your friend.

[split71]

Uh, the fan works just fine when in defrost. All speeds.

[Mr.X5_3.0si-retired]

don't wanna side track the thread but thought i'd ask a quick question..
anyone ever have it where they press the climate control buttons and their radio station tabs shows across the bottom of the screen??

[split71]

Update: I was also getting the "increased battery discharge" message. I figured out it was one of the Comfort access door handles (it had been acting wonky for a few weeks). I disconnected the handle from the system and it took 2 or 3 days before I stopped getting the message. An interesting side affect was the A/C blower would run at reduced speed until the battery/charging system reached a certain threshold (I assume). It would run on high only in defrost.

All works great, CA, A/C etc.

FWIW, the BMWhat app showed no codes at anytime and charging voltage was anywhere from 13.1 -14.6v.