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#1 User is offline   Piskie 

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Posted 18 November 2020 - 08:53 AM

Searched the forums to see if this had been answered but couldn't find anything.

My car is a 2008 3.0V6 Altitude

Here's my problem:

Air con isn't blowing cold. It blows on all settings and heats up fine, but no cold air. Had it regassed, then plugged into VCDS and no faults are coming up. There is voltage to the compressor and all appears to be working fine.

Suspected that it might be the ambient temp sensor, but here's the weird thing: The ambient temp yesterday read 15deg, which matched the outside temp. However inside the cabin, the air is blowing at 22 deg.

My mechanic suggested that it might be a heat flap that is stuck in the slightly open position which is heating the air instead of cooling it. He suggested trying different settings, changing the temp on climacontrol, changing the directional buttons and seeing if it somehow 'shifted' something. I've tried that for a couple of days now and still nothing.


Any ideas would be hugely appreciated. I run a chocolate business so it's essential that I'm able to keep the car cool in the summer.

On a slight side note I found this on the web whilst searching for answers. It doesn't really solve my problem, but it might give somebody an idea on here what's going on ?
http://www.volkspage...ssp/SSP_301.PDF

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#2 User is offline   Piskie 

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Posted 18 November 2020 - 08:55 AM

View PostPiskie, on 18 November 2020 - 08:53 AM, said:

Searched the forums to see if this had been answered but couldn't find anything.

My car is a 2008 3.0V6 Altitude

Here's my problem:

Air con isn't blowing cold. It blows on all settings and heats up fine, but no cold air. Had it regassed, then plugged into VCDS and no faults are coming up. There is voltage to the compressor and all appears to be working fine.

Suspected that it might be the ambient temp sensor, but here's the weird thing: The ambient temp yesterday read 15deg, which matched the outside temp. However inside the cabin, the air is blowing at 22 deg.

My mechanic suggested that it might be a heat flap that is stuck in the slightly open position which is heating the air instead of cooling it. He suggested trying different settings, changing the temp on climacontrol, changing the directional buttons and seeing if it somehow 'shifted' something. I've tried that for a couple of days now and still nothing.


Any ideas would be hugely appreciated. I run a chocolate business so it's essential that I'm able to keep the car cool in the summer.

On a slight side note I found this on the web whilst searching for answers. It doesn't really solve my problem, but it might give somebody an idea on here what's going on ?
http://www.volkspage...ssp/SSP_301.PDF


I should add that when I had it regassed at ATS, they did a pressure leak test, so that is all fine too.

#3 User is offline   hunterlees 

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Posted 18 November 2020 - 09:54 AM

I would check the live values from the G89 sensor using VCDS.
I had a similar fault and the sensor was incorrectly showing a negative temperature, which caused the aircon not to operate, although there were no fault codes showing.
Most Tregs will show an air quality sensor error, but this is not related to your issue.
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#4 User is offline   v6mikey 

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Posted 18 November 2020 - 05:11 PM

View Posthunterlees, on 18 November 2020 - 09:54 AM, said:

I would check the live values from the G89 sensor using VCDS.
I had a similar fault and the sensor was incorrectly showing a negative temperature, which caused the aircon not to operate, although there were no fault codes showing.
Most Tregs will show an air quality sensor error, but this is not related to your issue.


Exactly the same for me too.
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Gone VW Golf V6 4motion.

I do like the VW V6 petrol engines!

#5 User is offline   Piskie 

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Posted 18 November 2020 - 06:08 PM

View Posthunterlees, on 18 November 2020 - 09:54 AM, said:

I would check the live values from the G89 sensor using VCDS.
I had a similar fault and the sensor was incorrectly showing a negative temperature, which caused the aircon not to operate, although there were no fault codes showing.
Most Tregs will show an air quality sensor error, but this is not related to your issue.



Thanks for the reply.

G89 is the ambient temperature sensor right ? Had this checked via VCDS and it was showing 15deg, which was roughly the outside temp. So not low enough to prevent the air con from kicking in

Had the whole system checked by an air con specialist today. Turns out the pump in the compressor is goosed ! So it will need a new compressor.

looks like a horrendous job as it's located right at the bottom of the engine under the power steering pump. Does anybody know if this is accessible from below or can it only be removed by gaining access from the top of the engine ?


Thanks

#6 User is offline   cookie17 

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Posted 23 November 2020 - 07:16 PM

View PostPiskie, on 18 November 2020 - 06:08 PM, said:

Thanks for the reply.

G89 is the ambient temperature sensor right ? Had this checked via VCDS and it was showing 15deg, which was roughly the outside temp. So not low enough to prevent the air con from kicking in

Had the whole system checked by an air con specialist today. Turns out the pump in the compressor is goosed ! So it will need a new compressor.

looks like a horrendous job as it's located right at the bottom of the engine under the power steering pump. Does anybody know if this is accessible from below or can it only be removed by gaining access from the top of the engine ?


Thanks


Could you tell me where the G89 sensor is located ?

#7 User is offline   hunterlees 

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Posted 23 November 2020 - 07:24 PM

View Postcookie17, on 23 November 2020 - 07:16 PM, said:

Could you tell me where the G89 sensor is located ?

It is on the passenger side in the area where the pollen filter is, usually grey in colour.

Same as Q7
https://youtu.be/55dk4fil_xo
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#8 User is offline   cookie17 

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Posted 24 November 2020 - 06:57 PM

View Posthunterlees, on 23 November 2020 - 07:24 PM, said:

It is on the passenger side in the area where the pollen filter is, usually grey in colour.

Same as Q7
https://youtu.be/55dk4fil_xo

Thanks for the info

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