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Old 07-09-2017, 08:57 PM   #1
DOOZIE DAISY
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Default S3 xr8 ac compressor wont turn on?

Just disconnected my battery while fitting new coil packs to my xr8,all hooked up again and the ac compressor wont turn on now.
Am I missing something?
It worked a couple of months ago when I checked it?
The ac button light comes on when you press it but the comp isn't kicking in,i read that low gas can cause the comp to not kick in?
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Old 07-09-2017, 09:10 PM   #2
XC50077
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Default Re: S3 xr8 ac compressor wont turn on?

Check the fan switch is actually switched to 1,2,3 or 4. I had it only partially engaged and Air con switch wouldn't illuminate .Cheers.
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Old 07-09-2017, 09:37 PM   #3
DOOZIE DAISY
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Default Re: S3 xr8 ac compressor wont turn on?

Yeah fan switch is definitely on,fuse is good,relay has been swapped for a good one,when you press the on button the relay doesn't click on.
Almost like the ecu isn't telling it to turn on.
Ac button lights up when pressed.
I thought there was some trick I missed after reconnecting the battery.
I read in another ba thread if you wait for the error symbol to go out from the dash after you connect the battery again but it never went off.
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Old 07-09-2017, 10:09 PM   #4
DOOZIE DAISY
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Default Re: S3 xr8 ac compressor wont turn on?

Was hoping it may have been a simple fix I could sort tonight.
Ill book it in to get sorted.
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Old 08-09-2017, 11:45 AM   #5
DOOZIE DAISY
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Default Re: S3 xr8 ac compressor wont turn on?

As I kind of suspected,something was telling the compressor to not turn on,it was because the gas was low/non existant.
Leak near the receiver drier most likely the a/c guy told me,hopefully it doesn't turn out to be a dash out job if its not the drier...
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Old 20-09-2017, 07:15 PM   #6
DOOZIE DAISY
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Default Re: S3 xr8 ac compressor wont turn on?

Just for the record if the ac system is low on gas the compressor will not kick in, like a self preservation function to save the compressor from damage,just in case someone else has the same issue.
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