2006 V10 TDI No A/C - Page 2 - Club Touareg Forums
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post #11 of 19 Old 10-16-2017
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yes always 0000030. Im new to VAGCOM, where do I find MVP 13?, what does that stand for?....and shut down code, what will that look like.
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post #12 of 19 Old 06-04-2018
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Trying to reply to the "latest" blows warm concern - I checked the FAQ and a dozen or so threads on various forums. 2006 V10 TDI, bought with 72k on it last year (I know!!) and I got the best insurance they offered. Not much call for a/c last year in Alaska, and this spring is getting warm and it is hot in the car. It seems to blow about 80 degree air when on full cold setting with the ambient at 60 or so.

VAG-com shows no a/c codes - and says the compressor is running, gives the RPM. Is there a clutch you can visually check to confirm it's spinning? I don't have a lift, this plus having insurance had me dropping the car off at the local VW specialist shop this morning. I checked in on the way home and spoke a bit with the technician. He's a vw enthusiast, the VW tattoo on his arm at least means he "doesn't hate foreign junk". He said the same thing - compressor is running, and warm air in all zones (4 zone) - so he figures it's not a blend door - they have 2? Or 3? 4?

He said he then evac'd and refilled - and this process allowed him to determine how much refrigerant was in there - only 200 grams below spec. Maybe enough to make it not perform at top capacity - but it's really warm not doing it's job. It was close to the end of the day so I left it overnight and let him get back to checking it out.

If I get an "all fixed" tomorrow, I'll post up the cause and fix action - but I'm open to suggestions if the tech doesn't have a clear fix.

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post #13 of 19 Old 06-05-2018
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The AC compressor on the V10 is always spinning, unless the coupler from the power steering pump has failed. If you look just in front of the left engine mount from below, you can just barely see the shaft spin. In VCDS you can also see the refrigerant pressure. With the AC on, its should be around 9 bar. You made need to run a basic setting on the HVAC module to reset the blend doors.

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post #14 of 19 Old 06-07-2018
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Quote:
Originally Posted by chewblekka View Post
The AC compressor on the V10 is always spinning, unless the coupler from the power steering pump has failed. If you look just in front of the left engine mount from below, you can just barely see the shaft spin. In VCDS you can also see the refrigerant pressure. With the AC on, its should be around 9 bar. You made need to run a basic setting on the HVAC module to reset the blend doors.
I am concerned you are correct. It does have pressure in it. They are recommending a compressor. My extended warranty should cover it, it's about 3500 just to do that.

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post #15 of 19 Old 06-07-2018
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You should also look in the compressor load measuring blocks to see if the compressir is loading up when operating.
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post #16 of 19 Old 06-08-2018
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Quote:
Originally Posted by dragline1570 View Post
You should also look in the compressor load measuring blocks to see if the compressir is loading up when operating.
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Drag
I haven't had it back in my hands yet, and I'm about to go on vacation. I hope I have a repaired car when I get back, but it's still going thru warranty inspection/adjuster/approval - we'll see. To be honest I was half expecting the V10 to be refused when I got the car - $3k for a warranty seems cheap for a V10 Touareg even with only 72k on it. I will say this is the most perfectly maintained car I've ever had - most people assume it's a 2 or 3 year old car rather than 12 or 13.

I should have asked for help here sooner - I didn't see a way to measure loading. I can tell you my judgement is that it was NOT loading/doing any work with A/C on.

Has anyone done a heater core bypass valve? To keep heat out of the system for economy? I know the mid-90's Explorers had them - they are cheap, and vacuum operated, easy to install I would expect - IF the heater hoses are accessible at all.

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post #17 of 19 Old 06-18-2018
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you must know about it. .....
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post #18 of 19 Old 06-20-2018
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Quote:
Originally Posted by billford View Post
you must know about it. .....

Sure - multiple manufacturers make them and at least one company seems to advertise it like it's a special invention they provide:



here's an Ebay kit "for Ford Crown Victoria" but any car with a blend door would benefit from this - basically, you turn off hot water to the core, any leaking air past the core won't get heated up. Great for economy, not needing as much A/C if there isn't hot air blended into the air stream.

https://www.ebay.com/i/253244442681?chn=ps

here's another ebay sale - the Ford Explorer, Vacuum operated one I was familiar with:
https://www.ebay.com/itm/Motorcraft-...-/371176315424

Brings me to my V10 - some hot air is in the system even when set to "cool" - I am guessing this is to combat window fogging. It would be more economical to not need to cool air down to 50-60F on on a day when the ambient IS 50-60F already - so I plan to get something added on eventually.

But for now: I came back from vacation yesterday, the compressor HAD failed, and seized up tight. It is direct driven, but there is a rubber cog between the components that sheared off/ground away - so it was no longer actually turning.

New compressor - $$$$ in spite of the extended warranty. They would only pay for the cheapest rebuilt option - at about $500 - I paid an additional $700 to get VAG new unit. I don't want a 2 year quality rebuild when my warranty will run out in a year.

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post #19 of 19 Old 06-22-2018
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Smart move. Rebuilt AC compressors are all junk.
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