AC is always ON at startup

3.0L · 06-29-2021, 10:49 AM

I have an annoying problem with my M235i where the AC is ON when I first start the car, even if the air temperature is in the 60's or less. I've tried turning deselecting the "A" climate button; tried "M" on same button with no joy. The AC button is definitely OFF.

I took a look at the Climate menu and the timers are set to 0, as they have always been.

I've even tried selecting the "Auto" climate button and still no joy. The AC does eventually turn off by itself after about 5 minutes or so.

XutvJet · 06-29-2021, 11:38 AM

It's a factory setting. There's a humidity sensor in the car and if the humidity is high, the AC will run. It's done mostly to keep the cabin filter and HVAC ducts free of mildew.

morphomeman · 06-29-2021, 11:39 AM

I learn something new every day, thanks to this forum!

3.0L · 06-29-2021, 11:44 AM

Quote:

Originally Posted by XutvJet

It's a factory setting. There's a humidity sensor in the car and if the humidity is high, the AC will run. It's done mostly to keep the cabin filter and HVAC ducts free of mildew.

Thanks for the great info!

TrboMike · 07-01-2021, 11:17 AM

I think you can code the default to off? The HVAC will still turn itself on(even if it was off when car was shut off) but the A/C will not be on.

06-29-2021, 10:49 AM	#1
3.0L Colonel 8944 Rep 2,010 Posts Drives: M235i, 20k miles Join Date: Apr 2014 Location: California iTrader: (0)	AC is always ON at startup I have an annoying problem with my M235i where the AC is ON when I first start the car, even if the air temperature is in the 60's or less. I've tried turning deselecting the "A" climate button; tried "M" on same button with no joy. The AC button is definitely OFF. I took a look at the Climate menu and the timers are set to 0, as they have always been. I've even tried selecting the "Auto" climate button and still no joy. The AC does eventually turn off by itself after about 5 minutes or so. __________________ ///M235i \| Mineral Grey Metallic \| Premium Package \| Technology Package \| Driver Assistance Package \| Dakota Coral Red/Black Leather \| Harman/Kardon Premium 360 watt sound system \| 8-speed automatic When writing your life's plan, use a pencil with an eraser
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06-29-2021, 11:38 AM	#2
XutvJet Major General 5559 Rep 5,374 Posts Drives: 2011 Cayman Base, 2016 M235 Join Date: Mar 2016 Location: Kansas City iTrader: (-1)	It's a factory setting. There's a humidity sensor in the car and if the humidity is high, the AC will run. It's done mostly to keep the cabin filter and HVAC ducts free of mildew.
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06-29-2021, 11:39 AM	#3
morphomeman Major 593 Rep 1,220 Posts Drives: 2015 M235ix Join Date: May 2015 Location: United States iTrader: (1) Garage List 2016 BMW X3 [0.00] 2015 BMW M235ix [0.00]	I learn something new every day, thanks to this forum!
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07-01-2021, 11:17 AM	#5
TrboMike First Lieutenant 142 Rep 345 Posts Drives: BMW M240ix Join Date: Sep 2019 Location: 07508 iTrader: (0)	I think you can code the default to off? The HVAC will still turn itself on(even if it was off when car was shut off) but the A/C will not be on.
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