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E46 Convertible
The E46 vert forum. Talk about dropping your E46 top here.

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Old 05-29-2013, 03:45 PM   #1
Ganchetty
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AC with top down?

Guys, can i use the AC when the top is down? Is it going to harm the car somehow? I really need it sometimes when i'm stuck in traffic and the sun is killing me.
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Old 05-29-2013, 03:49 PM   #2
ANREC330
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AC with top down?

Yes you can. I use to do it in my vert all the time.


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Old 05-29-2013, 04:01 PM   #3
GuitVertible
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Me too. And don't forget to crank the heat when it's a little chilly, too.
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Old 05-29-2013, 04:03 PM   #4
Snik
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Hahahha. Lol@ question.
No man it's fine. Heat, AC, just fans. Don't matter.
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Old 05-29-2013, 04:10 PM   #5
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Originally Posted by Ganchetty View Post
Guys, can i use the AC when the top is down? Is it going to harm the car somehow? I really need it sometimes when i'm stuck in traffic and the sun is killing me.
How would it harm the car?

You should leave the "snowflake" button on all the time anyways. Running the AC system keeps the seals from drying out, which you'll appreciate if you've ever had to spend a small fortune to repair an AC system.
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Old 05-29-2013, 04:11 PM   #6
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Don't have to leave it on all the time. It doesn't hurt anything to not run it from time time to time.
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Old 05-29-2013, 04:14 PM   #7
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Thanks guys! Well yeah, just wanted to be sure that everything is going to be alright because the guy who filled my AC with freon told me not to do it because it's going to start throwing water out of the blowers. I've spent 1 year of sweating because of this idiot so you can laugh at me as much as you want
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Old 05-29-2013, 04:55 PM   #8
Snik
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AC with top down?

Guy that told u that is silly.


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Old 05-29-2013, 05:41 PM   #9
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Don't have to leave it on all the time. It doesn't hurt anything to not run it from time time to time.
That is true, yet not running it for months is bad for the system.
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Old 05-29-2013, 05:49 PM   #10
///M Powerd
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Here is a good guide to using the auto climate function in the E46.

http://www.m3forum.net/m3forum/showthread.php?t=427235

The A/C snowflake button should always be on.
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Old 05-29-2013, 07:21 PM   #11
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AC with top down?

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That is true, yet not running it for months is bad for the system.
That goes for ANYthing on a BMW pretty much. Don't use it, you lose it.


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Old 05-29-2013, 07:47 PM   #12
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That goes for ANYthing on a BMW pretty much. Don't use it, you lose it.
That is just as silly as the mechanic's advice to the OP not to use the AC.
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Old 05-29-2013, 07:59 PM   #13
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That is just as silly as the mechanic's advice to the OP not to use the AC.
really? dont use your sunroof or your power windows and see what happens.
Talk to any BMW tech, beesides the drivers door sometimes, the most common window regulator to fail, passenger rears, or side, the ones that are rarely used.
same with sunroof.

Look into it, you will find it to be very true.
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Old 05-30-2013, 12:05 AM   #14
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How would it harm the car?

You should leave the "snowflake" button on all the time anyways. Running the AC system keeps the seals from drying out, which you'll appreciate if you've ever had to spend a small fortune to repair an AC system.

Can't agree with your first sentence here. If that were the case, there would be no on/off button. Running the compressor when you don't need to cool or dehumidify the air just wastes gas, uses up engine power, and wears out the compressor. No question it needs to run periodically, but not constantly.
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Old 05-30-2013, 02:21 AM   #15
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I wouldn't be taking my BMW to that mechanic again if I were you. Idiotic advice. Next, he'll be telling you you shouldn't use your AC if you are going over 60mph cuz it's hard on the engine.

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Old 05-30-2013, 01:51 PM   #16
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can't agree with your first sentence here. If that were the case, there would be no on/off button. Running the compressor when you don't need to cool or dehumidify the air just wastes gas, uses up engine power, and wears out the compressor. no question it needs to run periodically, but not constantly.
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Old 05-30-2013, 04:57 PM   #17
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...and don't forget to close the passenger's vent so more cold air reaches you, the most important person in the car.
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Old 06-25-2013, 03:21 PM   #18
Drexellake
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I run mine all the time here in SC with the top down. It is good to run it a couple of times during the winter for a few minutes as maintenance.
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Old 07-06-2013, 12:34 AM   #19
The Thomas J
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AC on a hot day with the top down is sooooooooo nice.
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