HVAC dead, what happened?

tranquility · 01-13-2022, 02:28 PM

One day this warning symbol came on but nothing noticeably bad affected the car. Next time I use it, the HVAC is dead, i.e. the various lights operate but there is no fan at all. Another symptom is that keyless entry doesn't work (I tested w new battery so it's not that)...it only works immediately after I have driven the car but then after I come back to the car after doing some errands, I need to physically press the keyfob buttons to unlock the door/trunk.

I'll definitely need to get this professionally checked unless somebody knows what's wrong, so wondering if anybody can tell me what's up? TIA.

KennyP · 01-13-2022, 04:14 PM

My HVAC has quit on me a few times too.
But... after shutting car down and letting it sit for a while to reset its always come back next time.

I did google it some time ago and it seems to be related to how you start the car.

Correct way is to push down the brake pedal and then hit the start button.
But you can in a hurry push the button first and while holding it smash the brake pedal and that may cause that HVAC error.

Though if i think about it i havent had that issue after replacing cars battery. So it may or may not be related to that.

My HVAC has stopped like 3 times over almost 6 years of ownership.. When it happens HVAC controls are just dead and do nothing.. no lights or anything... and of course no air blowing.

Keyless stops working on mine when cars battery is getting low...

tranquility · 01-13-2022, 06:29 PM

Quote:

Originally Posted by KennyP

My HVAC has quit on me a few times too.
But... after shutting car down and letting it sit for a while to reset its always come back next time.

I did google it some time ago and it seems to be related to how you start the car.

Correct way is to push down the brake pedal and then hit the start button.
But you can in a hurry push the button first and while holding it smash the brake pedal and that may cause that HVAC error.

Though if i think about it i havent had that issue after replacing cars battery. So it may or may not be related to that.

My HVAC has stopped like 3 times over almost 6 years of ownership.. When it happens HVAC controls are just dead and do nothing.. no lights or anything... and of course no air blowing.

Keyless stops working on mine when cars battery is getting low...

Tx for your anecdote: I truly hope it's as simple as that as I do recall that I started the car in a 'weird' fashion (didn't crank properly as my foot slipped off the brake, and I had to start it again) and then this error msg popped up soon afterwards. I guess I'll see if it fixes itself next few times I use it. *fingers crossed*

KennyP · 01-13-2022, 08:22 PM

Im serious read this:

https://www.bimmerfest.com/threads/a...r-dead.610034/

tranquility · 01-13-2022, 10:36 PM

Quote:

Originally Posted by KennyP

Im serious read this:

https://www.bimmerfest.com/threads/a...r-dead.610034/

Haha tx, guess I'll try my own T-Fix if the HVAC still doesn't work next time. Wow, talk about blast from the past.

KennyP · 01-14-2022, 01:22 AM

Jeah i was a bit suspicious of tranquility-fix and your username matching up

tranquility · 01-14-2022, 01:27 PM

Quote:

Originally Posted by KennyP

Jeah i was a bit suspicious of tranquility-fix and your username matching up

"Suspicious"? ...and you getting very srs telling me to read that thread ASAP - you made it sound like I was doing something sinister.

KennyP · 01-15-2022, 05:25 AM

Well different forum so could be coincidence. You may not be the ONLY tranquility out there... I did not go deep into every link on that thread ... got the information i needed and that fixed my issue.
TBH noticed name similarity after writing that link containing reply.

tranquility · 01-15-2022, 01:43 PM

Quote:

Originally Posted by KennyP

Well different forum so could be coincidence. You may not be the ONLY tranquility out there... I did not go deep into every link on that thread ... got the information i needed and that fixed my issue.
TBH noticed name similarity after writing that link containing reply.

Haha, no worries, not trying to accuse you of anything.

TBH, I'm so confused about that 'other' forum, it's very weird to me, why isn't it the same format and I'm logged off there? They need to make things uniform and interconnected...doesn't make sense and it's very jarring.

Anyway, used the T-Fix and the HVAC is good again, but the error symbol is still there...according to my manual, it is either a fuel management issue or brake lights....but (knock wood) I didn't experience any symptoms for either.

01-13-2022, 02:28 PM	#1
tranquility sportscars only 3244 Rep 3,195 Posts Drives: 2011 Z4 sDrive 35i Join Date: Aug 2007 Location: Montréal iTrader: (0)	HVAC dead, what happened? One day this warning symbol came on but nothing noticeably bad affected the car. Next time I use it, the HVAC is dead, i.e. the various lights operate but there is no fan at all. Another symptom is that keyless entry doesn't work (I tested w new battery so it's not that)...it only works immediately after I have driven the car but then after I come back to the car after doing some errands, I need to physically press the keyfob buttons to unlock the door/trunk. I'll definitely need to get this professionally checked unless somebody knows what's wrong, so wondering if anybody can tell me what's up? TIA. Attached Images __________________ The richest one percent of this country owns half our country's wealth, five trillion dollars. One third of that comes from hard work, two thirds comes from inheritance, interest on interest accumulating to widows and idiot sons and what I do, stock and real estate speculation...It's bullsh*t. I create nothing. I own. We make the rules, pal...Now you're not naive enough to think we're living in a democracy, are you buddy?
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01-13-2022, 04:14 PM	#2
KennyP Lieutenant 147 Rep 463 Posts Drives: 2009 Havana E89 Z4 Sdrive35i Join Date: Apr 2016 Location: Estonia iTrader: (0)	My HVAC has quit on me a few times too. But... after shutting car down and letting it sit for a while to reset its always come back next time. I did google it some time ago and it seems to be related to how you start the car. Correct way is to push down the brake pedal and then hit the start button. But you can in a hurry push the button first and while holding it smash the brake pedal and that may cause that HVAC error. Though if i think about it i havent had that issue after replacing cars battery. So it may or may not be related to that. My HVAC has stopped like 3 times over almost 6 years of ownership.. When it happens HVAC controls are just dead and do nothing.. no lights or anything... and of course no air blowing. Keyless stops working on mine when cars battery is getting low... __________________ 2009 35i DCT Havana brown with ivory white interior. Mods: Cobb stage 1+FMIC, Wagner EVO1 FMIC, BMS DCI, KW V3 suspension, M3 front control arms, Hardrace RTAB, Michelin Pilot Sport 4S tires.
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01-13-2022, 08:22 PM	#4
KennyP Lieutenant 147 Rep 463 Posts Drives: 2009 Havana E89 Z4 Sdrive35i Join Date: Apr 2016 Location: Estonia iTrader: (0)	Im serious read this: https://www.bimmerfest.com/threads/a...r-dead.610034/ __________________ 2009 35i DCT Havana brown with ivory white interior. Mods: Cobb stage 1+FMIC, Wagner EVO1 FMIC, BMS DCI, KW V3 suspension, M3 front control arms, Hardrace RTAB, Michelin Pilot Sport 4S tires.
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01-14-2022, 01:22 AM	#6
KennyP Lieutenant 147 Rep 463 Posts Drives: 2009 Havana E89 Z4 Sdrive35i Join Date: Apr 2016 Location: Estonia iTrader: (0)	Jeah i was a bit suspicious of tranquility-fix and your username matching up __________________ 2009 35i DCT Havana brown with ivory white interior. Mods: Cobb stage 1+FMIC, Wagner EVO1 FMIC, BMS DCI, KW V3 suspension, M3 front control arms, Hardrace RTAB, Michelin Pilot Sport 4S tires.
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01-15-2022, 05:25 AM	#8
KennyP Lieutenant 147 Rep 463 Posts Drives: 2009 Havana E89 Z4 Sdrive35i Join Date: Apr 2016 Location: Estonia iTrader: (0)	Well different forum so could be coincidence. You may not be the ONLY tranquility out there... I did not go deep into every link on that thread ... got the information i needed and that fixed my issue. TBH noticed name similarity after writing that link containing reply. __________________ 2009 35i DCT Havana brown with ivory white interior. Mods: Cobb stage 1+FMIC, Wagner EVO1 FMIC, BMS DCI, KW V3 suspension, M3 front control arms, Hardrace RTAB, Michelin Pilot Sport 4S tires.
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