car acting funny

**le91688** · 08-30-2008 10:55 AM

Ever since my battery died and i had to input my radio code, when i start my car the AC will automatically go to 71degrees with like 4 bars of fan power. Even when i turn it off before i turn the car off (i always do) it comes on when i start up. It does it like , 75% of the time. Any ideas of whats up with this?

do i need to get it vag commed?

**Seerlah** · 08-30-2008 12:00 PM

It is not the A/C that turns on, but your automatic climate control. If it were the winter time and you had the same issue, more than likely the heat would automatically turn on till you reached the set climate. You should make sure that it is not set on Auto when you turn off the ignition.

I will look in the manual later to see if there is any specific thing (easy answer) related to your problem.

**le91688** · 08-30-2008 12:01 PM

I never have it set on auto. In fact unless its REALLY hot/cold out, its off, and the windows are down. (saves gas right :P )

just wierd because sometimes when i start it comes back on... never did this before.
Its not hurting anything, its just odd.

**Seerlah** · 08-30-2008 12:23 PM

I never use the climate control unless it is winter for the heat. Otherwise, I like fresh air from the windows. From what you are saying, you say that even though it is always in the off position, when you turn on the ignition it always starts in the "Auto" position. Hence, why the AC goes to full blast to reach the settings on your cmilate control.

If you have the radio code, my suggestion is to disconnect the battery ground, take out radio, take off instrument panel trim for the climate control/radio/cup holder/hazard/fog light switch/EPC, get a can of compressed air, take out the A/C head unit, disconnect connector for climate control, blast entire area with compressed air to clean area (might just be dust interference/dust bunnies. also place nice blast of compressed air on connectors. if you have an air compressor, that would do the job nicely), reconnect climate control connector, and basically just put everything back together. Then see if problem still persists. More than likely just a minor glitch caused by something really simple which cleaning/checking the area can remedy.

**MattzWarsteiner** · 08-30-2008 05:03 PM

Try pulling the battery again and waiting a few minutes. Pull up the diagnostic thingie and see if there are trouble codes.

The head may be losing standby power ...the keep alive power that remembers your last settings...and so when you start your car, it reverts to the factory programmed defaults. If you decide to get into the dash, check to see the unit is getting power when the key is off. Before that, a look at the fuses might be useful.