Ac compressor dead!

Hi all,

After 5+ years of ownership our car has developed its first real 'fault' and we have the same issue Maso describes in this thread - a goosed A/C compressor. Air conditioning isn't working and following advice on here I've checked the central boss on the compressor and it spins freely - so hopefully I'm correct in the diagnosis.

There's a fair load of these units on eBay from under £50 for used to new units at several hundred pounds. I don't fancy the latter so does anyone know of a way to test if a used unit is mechanically sound - or is it just a case of waiting for a reasonably priced one from a breaker that offers some guarantee? Thanks for any advice.
 
Hi all,

After 5+ years of ownership our car has developed its first real 'fault' and we have the same issue Maso describes in this thread - a goosed A/C compressor. Air conditioning isn't working and following advice on here I've checked the central boss on the compressor and it spins freely - so hopefully I'm correct in the diagnosis.

There's a fair load of these units on eBay from under £50 for used to new units at several hundred pounds. I don't fancy the latter so does anyone know of a way to test if a used unit is mechanically sound - or is it just a case of waiting for a reasonably priced one from a breaker that offers some guarantee? Thanks for any advice.

In addition to Murdo's enquiry (and also in an effort to provide assistance to him), can someone please tell me whether it's possible to remove an AC compressor without all the gas escaping?

Cheers,

Tom
 
All threads on the German side imply that this is not possible. There are no valves on it...

There should be oil in it already, and you should go and get the system re-gassed at the earliesst possible opportunity. Driving should only be with the system on ECO or off.

- Bret
 
parts required:
8z0260805A
8e0260749c
8e0260749b
8z0820193b
7h0820749 x 3
8e0820177
8e0260749 x 2
n0385491 x 2

new compressors are €523 in Germany (-discounts) so I would not bother with a replacement at €300. You should be able to get one there for less than €480 / £420 at today's rates.

- Bret
 
I would not bother with a replacement at €300. You should be able to get one there for less than €480

Thanks Bret, however you are too succinct for my lack of technical knowledge here. Are you recommending to only opt for a new part from Audi and if so, why?
 
Hiya M,

I've just removed the AC compressor from my breaker. The central boss doesn't spin freely, so I can only assume that it's perfectly good.

Cheers,

Tom
 
I've just removed the AC compressor from my breaker. The central boss doesn't spin freely, so I can only assume that it's perfectly good.

Brilliant. When can you come and fit it? ;)

Only joking - I'll PM you to make arrangements.
 
from here, if a new compressor is €480/£420 and a "refurb" £300, I wouldn't go for the refurb. Probably just as good, but if you've got a two-year warranty on the new part... or you can get one for virtually free, then fair enough.
You should make sure there's oil in there and that it gets filled correctly. There are some comments about PAG46 oil in the German forum threads, I haven't needed to do this so I'm not *that* up on what needs done.

- Bret
 
I wouldn't go for the refurb. Probably just as good, but if you've got a two-year warranty on the new part... or you can get one for virtually free, then fair enough.

Thanks Bret. I'm going to have a go at the low cost option and I have a trusty mechanic who will do the exchange and check the oil levels. If it doesn't work or goes phut again in the short term, I'd go down the new part route then - but for now it's worth taking the chance I think.
 
In addition to Murdo's enquiry (and also in an effort to provide assistance to him), can someone please tell me whether it's possible to remove an AC compressor without all the gas escaping?

Cheers,

Tom

It is IMPOSSIBLE.
 
All threads on the German side imply that this is not possible. There are no valves on it...

There should be oil in it already, and you should go and get the system re-gassed at the earliesst possible opportunity. Driving should only be with the system on ECO or off.

- Bret

It doesnt matter matter how you stear the system; ECO or OFF.
My issue was that I had gas in my system but my compressor just died so it didnt matter if i had it on Auto, Eco or off.
Than with the compressor replaced the gas was empty it still doesnt matter how you stear the system as in Auto, Eco or off. The gas triggers the compressor if it is working and either way it will not start as either you have a dead compressor filled with gas and the other a working compressor with no gas.
 
parts required:
8z0260805A
8e0260749c
8e0260749b
8z0820193b
7h0820749 x 3
8e0820177
8e0260749 x 2
n0385491 x 2

new compressors are €523 in Germany (-discounts) so I would not bother with a replacement at €300. You should be able to get one there for less than €480 / £420 at today's rates.

- Bret

Why buy new?
A second hand one can last a few years as well as there is bo guarantee to how long one can last, it is so induvidually.
Plus as i wast sure that it was my compressor that was busted i didnt wanna buy new one for a huge cost and to find out that it wasnt the compressor meaning i got two working compressors and one that costed med around £400-600 to buy plus the job to exchange it.
 
...a working compressor with no gas.

I think Bret's concern is that the compressor should not try to operate if there's no gas in the system. I'm no aircon expert, but I think Bret is suggesting that the compressor could be damaged if it turns on without being full of gas. As such, he advises that, once the dead compressor has been replaced with a working replacement, the system should be gassed as soon as possible and the aircon must not be allowed to switch on in the intervening period.
 
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from here, if a new compressor is €480/£420 and a "refurb" £300, I wouldn't go for the refurb. Probably just as good, but if you've got a two-year warranty on the new part... or you can get one for virtually free, then fair enough.
You should make sure there's oil in there and that it gets filled correctly. There are some comments about PAG46 oil in the German forum threads, I haven't needed to do this so I'm not *that* up on what needs done.

- Bret

Any certified AC guy will fill your system with oil and pressure check it prior to filling just to see if all gaskets havent dried out or that your system might be leaking somewhere.
Therefor I would recommend any one if they are unsure to why their AC isnt working to go to a AC shop first for a check if your system and they can narrow it down or even pin point exactly where your issue lies.
 
Thanks Bret. I'm going to have a go at the low cost option and I have a trusty mechanic who will do the exchange and check the oil levels. If it doesn't work or goes phut again in the short term, I'd go down the new part route then - but for now it's worth taking the chance I think.

I went with the same plan as welk. I changed my compressor to a 2nd hand one and if my AC goes bust again i will recognize the issue and know its due to the 2nd hand compressor which will tell me to invest in a new or even better, ill hand in my original one that was bust to restore it to its new glory and those shops than on here in sweden at least give 12months warranty on their work.
 
I think Bret's concern is that the compressor should not try to operate if there's no gas in the system. I'm no aircon expert, but I think Bret is suggesting that the compressor could be damaged if it turns on without being full of gas. As such, he advises that, once the dead compressor has been replaced with a working replacement, the system should be gassed as soon as possible and the aircon must not be allowed to switch on in the intervening period.

And what I was tryig to say according to my AC guy is that the compressor will stop working automatically if gas is slowly or fastly seaping out. In other words the compressor will not run if its out of gas. If there is gas and the compressor doesnt work its the compressor that is bust.
If/when you change compressor the gas will ALWAYS dissapear as there is no way to change a compressor without loosing AC gas. So with s new compressor you will not have any gas anyways that means there is no chance in hell it can trigger it no matter how you control it thru the system OFF, AUTO or ECO mode as only gas can trigger that super little valve inside the AC system that starts it.
 
And what I was tryig to say according to my AC guy is that the compressor will stop working automatically if gas is slowly or fastly seaping out. In other words the compressor will not run if its out of gas. If there is gas and the compressor doesnt work its the compressor that is bust.
If/when you change compressor the gas will ALWAYS dissapear as there is no way to change a compressor without loosing AC gas. So with s new compressor you will not have any gas anyways that means there is no chance in hell it can trigger it no matter how you control it thru the system OFF, AUTO or ECO mode as only gas can trigger that super little valve inside the AC system that starts it.

I thought that might have been what you were saying. Cheers.
 
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