the snooper
getting older by the day
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My air con stopped working ages ago but with the weather we get I don't think I'll need it re-charging anytime soon
- Thread starter norsa
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colnerov
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Hi, The authorities do care what the air-con engineers do and will come down like a ton of bricks on them for infractions. They're certified because they're accountable for the gas and can't charge a system knowing there's a leak. On the other hand they can't effectively control what the general public do and certainly not impact damage to the system. To be honest the engineers don't care what the owner has done or how he's fixed it as long as the integrity of the system is sound and they stick to their procedures for testing and charging then they are in the clear.
It's like a lot of these rules and regulations, the authorities are not really bothered about the day to day practicalities but if anything goes wrong then the rules are in place to penalise.
Colin
It's like a lot of these rules and regulations, the authorities are not really bothered about the day to day practicalities but if anything goes wrong then the rules are in place to penalise.
Colin
To the poster there has been a lot of common sense suggested above, myself i would fit the compressor, advise the engineer recharging what you have done there will/should be a data chart for the vehicle to advise how much oil needs to be added to the recharge for the component changed.
My only suggestion/query to add would be did the compressor fail in a catastrophic way IE did it dump its guts into the supply lines?
If it did then they will need to flush as mentioned above as if not done it will wreck the new compressor quite quickly, if its just worn and not broken up you should be fine with fitting the compressor and a recharge.
A flush is a little more complicated to do as it should mean the evaporator valve is isolated from the rest of the system as any flushing will push crap into the valve and jam/clog it.
On a side note how long has it been without gas? you may have a few issues with dry seals to start with.
The main reason aircon fails is because its not used, so seals dry out and gas leaks, if you have it ticking over all the time it will dry the air in the winter and make driving safer (no steamy windows) also stops the seals from drying, have mine is on all the time much to the annoyance of the wife.
Hope it works out for you
My only suggestion/query to add would be did the compressor fail in a catastrophic way IE did it dump its guts into the supply lines?
If it did then they will need to flush as mentioned above as if not done it will wreck the new compressor quite quickly, if its just worn and not broken up you should be fine with fitting the compressor and a recharge.
A flush is a little more complicated to do as it should mean the evaporator valve is isolated from the rest of the system as any flushing will push crap into the valve and jam/clog it.
On a side note how long has it been without gas? you may have a few issues with dry seals to start with.
The main reason aircon fails is because its not used, so seals dry out and gas leaks, if you have it ticking over all the time it will dry the air in the winter and make driving safer (no steamy windows) also stops the seals from drying, have mine is on all the time much to the annoyance of the wife.
Hope it works out for you
norsa
old school painter
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It was all working well albeit a howling from what's turned out to be a worn internal bearing on the main shaft. I had it De gassed 2 weeks ago and up until then it was always on . summer or winter. Anyroadup. I fitted the new compressor which had 125ml of oil in and a receiver yesterday. It won't be switched on now until it's been re gassed.
ms08
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norsa
old school painter
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So many posts never actually get to the final stage so one is left with the "SO" "What happened?" Well ill tell you what happened. I took it in this morning and for the first time, managed to speak to the guy who did the training for the machine. He tells me he hooks it up to the high pressure and the low pressure valves, inputs the car details, and what has been replaced. He then presses the start button and goes off for a fag for a while. (for our American friends, that simply means he goes outside and smokes a cigarette) Whilst he's doing that, the machine, tests for leaks, totally evacuates all the oil and any dirt/moisture in the system, flushes the system out, replaces the oil with the correct grade and capacity (doh) and re gasses the system.
Nick
Nick
the snooper
getting older by the day
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Lovely and cool again, inside and out, where is our great summer, must have had a get out of jail free card 
Going back to the OPs original post, I have noted that no one has mentioned that Pag oil is extremely hygroscopic. Personally, whenever I have to change a compressor I empty the oil that comes with it and fill it with fresh new stuff. Usually the amount you need is stamped on the compressor. Remember the oil you put in the compressor doesn't just sit there like a car it gets mixed with the gas so remember to turn the compressor over a few times by hand before vacuuming the system.
premmington
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I would disagree with the statement "Pag oil is extremely hygroscopic".
I don't think it is, compressor oil even it if is for workshop compressor does not absorb moisture. It is its defining quality that makes it compressor oil!
I have extracted litres of pag oil from aircon systems, never has it been milky, not ever!
colnerov
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Hi, PAG is very hygroscopic POE less so. It's nothing like compressor oil. In fact aircon compressors are more like pumps because it's a closed system.
http://www.idsrefrigeration.co.uk/lubricants-pag-oils
Colin
http://www.idsrefrigeration.co.uk/lubricants-pag-oils
Colin
premmington
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Interesting link! Thanks...
