Heat turning on, on its own?

335iVlad · 01-14-2015, 11:44 AM

I noticed often when I drive with the heat off, it turns on by itself at random times. Is that normal?

335NJ · 01-14-2015, 12:44 PM

Quote:

Originally Posted by 335iVlad

I noticed often when I drive with the heat off, it turns on by itself at random times. Is that normal?

If you have iDrive go into climate settings and make sure there's nothing abnormal there.

mike3000fl · 01-14-2015, 01:29 PM

My car did this too. It's comes on at a low setting. Has something to do with the condensation sensor and the outside air temp versus what you have the inside set to. I turn it off and it comes back on. There was a thread on here awhile back about it.

335iVlad · 01-14-2015, 04:11 PM

Quote:

Originally Posted by mike3000fl

My car did this too. It's comes on at a low setting. Has something to do with the condensation sensor and the outside air temp versus what you have the inside set to. I turn it off and it comes back on. There was a thread on here awhile back about it.

Yeah that's exactly what happens. Not too bothered, just wanted to know what it was. Thank you

ToastOfTenacity · 01-14-2015, 04:14 PM

I asked the dealer about this when I went in a few months ago, and they said it was normal, there's a fault in the design of one of the sensors is what he told me. Not sure if it's BS or not, but it sounded reasonable.

yas_e92 · 03-06-2015, 11:02 AM

i drive a 08 335xi and recently when i turn on the heat it seems really weak. cant even hear the air coming through the vents. but when i turn the defrost on for the front windshield you can hear the difference in pressure. is that normal? i had my car at a body shop for a couple weeks and i cant seem to remember if my heat has always been silent or weak or if its something new

Midnight_e90 · 03-05-2024, 09:28 PM

I have an 06 325i and it has recently started doing this, is there anyway of fixing it?

StradaRedlands · 03-06-2024, 10:03 AM

If you have the Auto setting on, then it will use sensors to get that side of the cabin to the set temperature. If Auto is off, then it will just blow out hot/cold air depending on the temp. The dash vents have a manual temp setting which is a physical dial. You can use that to adjust those independent of the other settings. Auto is pretty awesome once you play around with it and figure out the nuances... I've come to really like it after several years of ignoring it!

01-14-2015, 11:44 AM	#1
335iVlad Private First Class 25 Rep 185 Posts Drives: 2013 E93 335i Join Date: May 2014 Location: Brooklyn iTrader: (1)	Heat turning on, on its own? I noticed often when I drive with the heat off, it turns on by itself at random times. Is that normal? __________________
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01-14-2015, 01:29 PM	#3
mike3000fl Banned 138 Rep 2,731 Posts Drives: 06 330i Join Date: Feb 2010 Location: Tampa iTrader: (0)	My car did this too. It's comes on at a low setting. Has something to do with the condensation sensor and the outside air temp versus what you have the inside set to. I turn it off and it comes back on. There was a thread on here awhile back about it.
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01-14-2015, 04:14 PM	#5
ToastOfTenacity Nurburgring Nate 1 Rep 116 Posts Drives: 2008 E90 335i Join Date: Sep 2014 Location: Texas iTrader: (0)	I asked the dealer about this when I went in a few months ago, and they said it was normal, there's a fault in the design of one of the sensors is what he told me. Not sure if it's BS or not, but it sounded reasonable. __________________ "I'd rather lose by a mile because I built my own car than win by an inch because someone built it for me." -Moog 2008 335i Sport Package
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03-06-2015, 11:02 AM	#6
yas_e92 Private 12 Rep 79 Posts Drives: F82 m4 E92 335 Join Date: Sep 2014 Location: IL > TX iTrader: (0) Garage List 2011 e92 335xi M-Sport [0.00]	i drive a 08 335xi and recently when i turn on the heat it seems really weak. cant even hear the air coming through the vents. but when i turn the defrost on for the front windshield you can hear the difference in pressure. is that normal? i had my car at a body shop for a couple weeks and i cant seem to remember if my heat has always been silent or weak or if its something new
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03-05-2024, 09:28 PM	#7
Midnight_e90 Registered 0 Rep 1 Posts Drives: Bmw 325i Join Date: Mar 2024 Location: California iTrader: (0)	I have an 06 325i and it has recently started doing this, is there anyway of fixing it?
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03-06-2024, 10:03 AM	#8
StradaRedlands Brigadier General 4943 Rep 3,000 Posts Drives: 2006 BMW 330i MT Join Date: Dec 2021 Location: SoCal iTrader: (2) Garage List 2006 BMW 330i [8.21] 2009 BMW 328i Touri ... [7.90] 2013 BMW X5 35i [7.63] 2011 BMW 528i [8.75] 2006 Mazda3 [5.50]	If you have the Auto setting on, then it will use sensors to get that side of the cabin to the set temperature. If Auto is off, then it will just blow out hot/cold air depending on the temp. The dash vents have a manual temp setting which is a physical dial. You can use that to adjust those independent of the other settings. Auto is pretty awesome once you play around with it and figure out the nuances... I've come to really like it after several years of ignoring it!
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