ECON button stuck on and no AC

[AllroadMass]

So my ECON light won't come off and VAGCOM gave me a code reading of the High Pressure Sensor (g65) 07-00 signal too low. Checked the pressure and absolutely 0 on low and high. Put a little R134 into the system and sure enough, I can hear a loud hissing sound coming from behind the condenser (driver side). Waiting for my can of 134 with dye to come in so I can see exactly where the leak is coming from.

1)Has anyone replaced any of the hoses from the condenser to the compressor?
2) can I get to the compressor by just putting the car in service position or do I need to take off the whole front end?
3) I'm prying to baby jesus that it's just an Oring or a hose and not the Compressor....

I've had the car for about 8 days

[chain_slappins4]

you can try the r13r with the sealant, if it's an o ring, it might seal it, if not, your out the 18 bucks and you know you have to change the hose out...

GL with the fix

Sent from the S4 with a Tap!!!

[Alexztt]

I wouldn't use refrigerant with sealer it can cause havoc on other parts of the system. If it hissed out that fast there will most likely be an oil stain where it all rushed out.

[AllroadMass]

Yea I was thinking the same thing but I couldn't see anything. So I bought some dye and my UV light will be coming in tomorrow. So I'll pinpoint exactly where it is hopefully.

Since it's hissing like a bastard, it's safe to say that the compressor is working correct?

I got the bumper off and I had some other stuff to replaced so I'm going to get to it now.
1) Secondary air injector sounds like a jet
2) passenger side headlight spray nozzle is clogged

What else should I do while I have the condenser and radiator off?

[jakeoboy67]

Yea I was thinking the same thing but I couldn't see anything. So I bought some dye and my UV light will be coming in tomorrow. So I'll pinpoint exactly where it is hopefully.

Since it's hissing like a bastard, it's safe to say that the compressor is working correct?

I got the bumper off and I had some other stuff to replaced so I'm going to get to it now.
1) Secondary air injector sounds like a jet
2) passenger side headlight spray nozzle is clogged

What else should I do while I have the condenser and radiator off?

belt, tensionner, idler ? how long since the last change ?

[AllroadMass]

belt, tensionner, idler ? how long since the last change ?

I have paperwork all the way back to 2011 and I can't find any of those things being changed. Is that weird?

I'm the 3rd owner and previous owners did all service at audi Dealer so I would have thought that would be included in one of the service schedules.

[AllroadMass]

okay so I had some more time to take off the radiator today. I injected some dye into the system and scared the living daylights out of me when I saw specks of dye over the body of the compressor. I took the two lines connecting to the compressor off to inspect the oring and look what I found. Dye all over the mating surface which I did not see on any other connection points. Looks like the o-ring on the line from condenser to compressor is shot.

https://drive.google.com/open?id=1Um...8EGl8KCgJd05kw

I'm hoping this is the problem and not the compressor itself.

[REVOofRustler]

Hopefully the O Ring solves it, but if it doesn't, this thread is a gold mine for AC stuff on our cars: http://www.audizine.com/forum/showth...pressor-Issues

[AllroadMass]

Hopefully the O Ring solves it, but if it doesn't, this thread is a gold mine for AC stuff on our cars: http://www.audizine.com/forum/showth...pressor-Issues

I hope so too! I thought about replacing the entire line but I don't think that's necessary. I've never heard of an oring failing but then again I've only had it for less than 2 weeks! Bumper and radiator removal took me like 2 hours with draining the coolant and power steering lines. So my plan is to replaced the o ring, put everything back together and then bringing it to my stealership to have them properly drain and recharge the system. Wish me luck that the 0 ring is it!

Maybe I should do the valve cover gaskets too while I'm here? It was recommended to the previous owner back at 65k but doesn't seem like it is actually losing that much oil. Belt looks fantastic for 123k miles but I think I'm going to replace it with OEM.

[AllroadMass]

http://www.ebay.com/itm/152147584973...%3AMEBIDX%3AIT


Does anyone know what the yellow ring at the end of the hose is called? I'm going to replaced the purple 0 ring but I think I'm going to replace the yellow ring as well as long as I can get them without buying the entire hose.

[dmanisgnarly]

I have no clue but I just changed a broken line and have a used yellow and purple O-ring if you need em'

[AllroadMass]

How the heck did you get the yellow thing off? I tried and didn't want to brake it so left it alone. The dealer said it comes attached with the hose like that so I'm glad I didn't break it.

Putting on all new purple orings everywhere and just waiting for the one between compressor and condenser (on the condenser side). So I had some time to kill and went ahead and did the valve cover gasket. Pleasantly surprise how simple it was as long as you have some patience.

Snub mount and accessories belt next to go in when they arrive. Can't wait to put the whole system back together already! Thanks to everyone for all the input. Much appreciated.

[AllroadMass]

Hopefully the O Ring solves it, but if it doesn't, this thread is a gold mine for AC stuff on our cars: http://www.audizine.com/forum/showth...pressor-Issues

So got everything back together a few days ago and I bought a vacuum pump to pull my system before recharging it. Couldn't hold a vacuum so I put in some r134 with dye into the system to get a better picture. Dang it! Right away I hear a very loud hissing sound at the bottom of the car just like before. Let it charge the system for about 10 minutes and put my uv light on it. tons of residue on the body of the compressor at the drive shaft and also power steering pump (it's behind/below it).

Sounds like I'm going to be looking for a compressor tonight!

[REVOofRustler]

Bummer, man! Good on you, though, for doing it yourself!

[AllroadMass]

Bummer, man! Good on you, though, for doing it yourself!

Thanks man! Just can't justify $3400 repair when I can do it myself. Going to take a ton of pictures of post them up for future.

[AllroadMass]

Has anyone purchase the JHM compressor? Looking for a new OEM compressor and this is the cheapest one I found but wondering if anyone actually bought one before.

https://jhmotorsports.com/shop/catal...-s6-p-549.html

[924Carrera]

Has anyone purchase the JHM compressor? Looking for a new OEM compressor and this is the cheapest one I found but wondering if anyone actually bought one before.

https://jhmotorsports.com/shop/catal...-s6-p-549.html

That's basically just the OEM compressor without the Audi branding (which is how I buy as many parts as I can, since the Audi branding adds up to 2x+ cost). So I wouldn't hesitate for a moment to buy it. I went with a cheaper compressor manufactured by Nissens and it has been fine so far, but Nippon-Denso is what your car was built with.

[AllroadMass]

That's basically just the OEM compressor without the Audi branding (which is how I buy as many parts as I can, since the Audi branding adds up to 2x+ cost). So I wouldn't hesitate for a moment to buy it. I went with a cheaper compressor manufactured by Nissens and it has been fine so far, but Nippon-Denso is what your car was built with.

Thanks! FCP Euro has the Nissens one for $380 and I found a used compressor from B7 RS4 for $300 but I just don't want to do it again anytime soon. How long has the Nissens been in your car?

[brooklynA42004]

Thanks man! Just can't justify $3400 repair when I can do it myself. Going to take a ton of pictures of post them up for future.

$3400 is a crazy price! I had mine done for $700 last week.

[924Carrera]

Thanks! FCP Euro has the Nissens one for $380 and I found a used compressor from B7 RS4 for $300 but I just don't want to do it again anytime soon. How long has the Nissens been in your car?

Just over a year. Still works perfectly. However, I don't drive the S4 daily.

...mostly because the rest of the car is never working haha.

[AllroadMass]

Just over a year. Still works perfectly. However, I don't drive the S4 daily.

...mostly because the rest of the car is never working haha.

LOL I hear that! Closing in on 3 weeks of ownership and I've spent a little over $1k just to make it perfect and now the compressor craps out on me! hahah but man I love this thing. The engine feels so much stronger than my wife's allroad 4.2

[AllroadMass]

$3400 is a crazy price! I had mine done for $700 last week.

Even an indy shop around here wants a little over $2k. Took me 5 hours (sloth pace) to get the whole front off and drained/filled p/s and coolant when I put it all back together. So I'm not sure how they're getting these prices but people def pay. Gonna start just going A/C work for S4

[AllroadMass]

So I finally got everything in order for the repair, Denso compressor, orifice tube, and receiver/dryer. My old compressor doesn't have any oil left in it. The instruction for the new compressor said to measure how much oil is in the old system and remove correct amount from the new compressor. The new one came with 120ml. Does anyone know how much oil the Denso compressor came with from factory?

[924Carrera]

So I finally got everything in order for the repair, Denso compressor, orifice tube, and receiver/dryer. My old compressor doesn't have any oil left in it. The instruction for the new compressor said to measure how much oil is in the old system and remove correct amount from the new compressor. The new one came with 120ml. Does anyone know how much oil the Denso compressor came with from factory?

The replacement compressor should have the correct amount in it. However, the Bentley guide lists the exact values.

[AllroadMass]

The replacement compressor should have the correct amount in it. However, the Bentley guide lists the exact values.

We should just exchange numbers so I can just text you these questions Thanks for the info, I really appreciate it.

[924Carrera]

We should just exchange numbers so I can just text you these questions Thanks for the info, I really appreciate it.

According to the Bentley, 8 cyl "A4" (aka S4) with SEU17 type compressor (which this is) should contain 130 mL +/- 10mL, so 120 should be fine.

By the way, I do highly advise getting the Bentley manual. I think I paid $80 for it and it is extremely detailed. The wiring diagrams alone are worth half that IMO.

[AllroadMass]

I looked on ebay but I couldn't find it! I bought one for my wife's allroad but didn't find the B6 s4 version of it. where did you get yours?

[924Carrera]

Looks like it is $90 now. I'm not sure they ever made a physical copy, hence the lack of results on eBay. The downside of the disc is that it requires Windows XP. However, Windows 7 Pro has Virtual PC built into it (that's what I use), and I'm sure VMWare can be purchased for other versions of Windows as well.

https://www.ecstuning.com/Audi-B6_S4--V8/ES6277/

[AllroadMass]

putting in the order now. Thanks. Should I replace the condenser too while I'm at it? My old man is telling me I should....

[924Carrera]

putting in the order now. Thanks. Should I replace the condenser too while I'm at it? My old man is telling me I should....

It is a good idea. Modern condensors are difficult to flush through because they have very small passages. The flush tends to simply take the path of least resistance and go through the passages that aren't clogged, leaving metal debris from the failed compressor to contaminate the system, which could lead to a short life on the new compressor. Unfortunately, there aren't really any good aftermarket condensor options. I took the gamble on buying a Nissens one from ECS only to find that, like the others, it has 0 mounting provisions for the power steering cooler. I don't know how the condensor can be considered a valid replacement part if it doesn't fit where the old one is, but that's what you get. I ended up just getting mine from Audi for $350. (www.genuineaudiparts.com is where I typically buy)

[AllroadMass]

I was actually looking at the Nissen one from ECS so thank god you mention something. It was a $260 difference but I like to stick with OEM where possible. Should have the condenser next week so hopefully I'll have AC soon! Thanks for all the feedback and will put up finish results.

[REVOofRustler]

Looks like I might be a tad late with this, but I got the Nissens unit from JHM when I did mine in May. The Nissen compressors are manufactured in both China and Denmark. I read that the ones from Denmark are better quality than the Chinese ones. JHM sells the ones from Denmark, so that's why I went that route. So far so good with mine!

[roboto_1337]

http://www.audizine.com/forum/showth...button+won%27t

A number of problems that came up with the ECON button stuck on

[ven0m]

AllroadMass good luck with the compressor change, I'll follow your work as I also have a bad suspision that I'll be in the same boat sooner or later. I'm suspecting an Audi tech blew my compressor because they overcharged the refrigerant to 150%... 3 months after the overcharge, we checked the system (which was blowing warm air) and it had only 30% of refrigerant in it, so either they messed up the initial charging and it didn't even fill or there is a leak (which they can0t find ofcourse). For now after the correct amount was filled it's cooling but I have a bad feeling it won't for long.

@Everybody, can anybody with a healthy A/C check with their VAG-com how much torque the A/C pulls?
The last time I measured on my (at the time) "overcharged" system was 0.7Nm when OFF and 10Nm when ON.

[AllroadMass]

Looks like I might be a tad late with this, but I got the Nissens unit from JHM when I did mine in May. The Nissen compressors are manufactured in both China and Denmark. I read that the ones from Denmark are better quality than the Chinese ones. JHM sells the ones from Denmark, so that's why I went that route. So far so good with mine!

Good to know and I hope it keeps blowing cold for you for a long time. I'm hoping to get a good amount out of the Denso so fingers crossed.

[AllroadMass]

Got everything and ready to swap. I have everything taken apart but can't for the life of me get the compressor to separate from the stupid shaft! I can wiggle and almost rotate/pull the entire compressor with the shaft attached but looks like it's a little stuck on the thermostat housing at the bottom.

Do I have to separate the compressor from the shaft before I can get the dang thing out? Or worst, do I have to disassemble the lower thermostat housing??

[REVOofRustler]

I had the same problem with getting my compressor out. If you look at the back of the compressor, the plate that the shaft threads into is held on by 6 allen head bolts. I just took those out and just bolted the new compressor up to it when I put it in. The 6 bolts aren't too tight, either. The way I did it was to take out the bolts I could get to, and then when I got those out, I'd crank the motor for a second with the fuel pump fuse pulled. I had to do it a couple times, but eventually the motor will stop with the other screws in a spot where you can get to them.

Anyways, here it is once I got the compressor out

[924Carrera]

I also had the same problem. I just ended up pulling the water pump because I didn't want to take the compressor apart. Your call on which method suits you best.

[Concavitor]

What the ETA on cold air? Going on five weeks. Hope it's not a hot one there.

[AllroadMass]

I also had the same problem. I just ended up pulling the water pump because I didn't want to take the compressor apart. Your call on which method suits you best.

Can I pull out the whole shaft and AC compressor after the water pump is disassemble?

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