Weird A/C hiccup this morning

[Keebs_yo]

As stated in the title, I left the house for my normal commute to work and the A/C was blowing cold, but about 5 minutes in it started blowing warm without any input from myself. A/C was in auto mode and set to 68 F. And yes the center vent dial was rotated to the blue side lol! Anyway, took it straight to the dealership since warranty and all they did was scan my key (so they said) and it started blowing ice cold again?! So I’m happy it’s working, but confused about what happened. Only other condition to note which may or may not have played a part was that I was into my fuel reserve, but even after I fueled up the A/C was still blowing warm. Figured I’d post this to see if anyone has ever experienced the same or similar.

[wlin001]

Originally Posted by Keebs_yo

As stated in the title, I left the house for my normal commute to work and the A/C was blowing cold, but about 5 minutes in it started blowing warm without any input from myself. A/C was in auto mode and set to 68 F. And yes the center vent dial was rotated to the blue side lol! Anyway, took it straight to the dealership since warranty and all they did was scan my key (so they said) and it started blowing ice cold again?! So I’m happy it’s working, but confused about what happened. Only other condition to note which may or may not have played a part was that I was into my fuel reserve, but even after I fueled up the A/C was still blowing warm. Figured I’d post this to see if anyone has ever experienced the same or similar.

Did you turn on engine auto start/stop function? AC will shut off while the engine stop function is on (i.e., waiting at a stop light)

[Keebs_yo]

Originally Posted by wlin001

Did you turn on engine auto start/stop function? AC will shut off while the engine stop function is on (i.e., waiting at a stop light)

I have that “feature” disabled thru BimmerCode. A/C still blowing cold today without any further issues. I dunno, maybe the temp sensor utilized for the climate control went screwy or offline for a bit? However I didn’t see any error codes either so hard to really say Not gonna worry about it unless it goes warm again on me cuz that’s no bueno this time of year here in Central Florida!

[wlin001]

Originally Posted by Keebs_yo

I have that “feature” disabled thru BimmerCode. A/C still blowing cold today without any further issues. I dunno, maybe the temp sensor utilized for the climate control went screwy or offline for a bit? However I didn’t see any error codes either so hard to really say Not gonna worry about it unless it goes warm again on me cuz that’s no bueno this time of year here in Central Florida!

Does sound like a sensor issue. Good luck

[vietboyx1115]

Something similar happened to mine a few weeks back. Dealer told me it's a common issue, but the fix was adding a spacer to the A/C Temp sensor to back off the evaporator. Apparently it thinks it's getting too cold so thats why the A/C stops blowing cold.

[Keebs_yo]

Originally Posted by vietboyx1115

Something similar happened to mine a few weeks back. Dealer told me it's a common issue, but the fix was adding a spacer to the A/C Temp sensor to back off the evaporator. Apparently it thinks it's getting too cold so thats why the A/C stops blowing cold.

Interesting. Thanks for the insight!