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Discussion Starter · #1 ·
I have a 2011 520 tourer. Had the aircon regassed, but still not working. Can anyone recommend a good and trustworthy garage/machanic around the Croydon (Surrey) area who could take a look and give a quote please? Any thoughts regarding what I could do to check it out myself (at least to get an idea what's wrong) would be helpful too. Very many thanks.
 

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See if whoever re-gassed it will check to see if it still has gas. You may have a split pipe or other leak.

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Discussion Starter · #3 ·
Many thanks Flynn50. I should have thought they would have done that at the time; so not sure if they really are competent. I believe the clutch on the compressor pully should pop in and engage when the aircon is turned on, but it doesn't. I can still turn it by hand with aircon on and engine running. What does that indicate? Thanks again!
 

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Sorry mate I'm no expert. I just check the simple things first.
And yes, you would expect them to check if the system is holding gas.

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Legally they have to check it's holding gas - and the machines do this as part of the purge/vacuum test/refill process. A pin prick leak can sometimes get past, but they won't refill something that fails the vacuum test because it's an offence to discharge the gas into the atmosphere.

The machines should give you a print out of how much gas and lubricant was removed from the system and how much was put back in - normally the garage gives you a copy of that. It is just possible that they tried to fleece you by putting the minimum amount of gas in rather than the full charge and, in doing so, under cooked it to the point where it's not working but that's fairly unlikely.

Fault codes would be my first check here - there are plenty of sensors that can act up and cause trouble.
 

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Discussion Starter · #6 ·
Thanks Evog. The re-gas was done only just before the first lockdown last year; so couldn't follow up straight away. Had no work; so no cash for the next year! Can't remember now what I was given, but they said the component parts of the aircon would need checking; so I'm probably falsely accusing them. It's only now I'm trying to get it sorted, but as it can be a very expensive repair I'm very dubious about getting an honest quote, hence my enquiry into recommended garages in or around Croydon Surrey. Or maybe how I could narrow things down by checking myself. I used to do all my own repairs/rebuilds years ago before cars were totally computerised - also before car aircon!! I will take your advice regarding checking the fault codes. Thanks again!
 

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Own an E61 N47 assume yours is F11, had a similar issue with Kwik Fit - Claimed they couldn't find a leak, when charged it would last half a day ice cold then nothing, went back a few times UV dye etc and none the wiser. Had a specialist come out to my house test system with nitrogen, leak was so bad you could hear it! No clue what the Kwik fit chap was doing. Mine was on the condenser, easy repair, I replaced the part and the independent specialist recharged the system.

Did yours work initially when re gassed? If so the condenser is the likely candidate but as mentioned there are lots of sensors which could also be causing issues, refrigerant pressure must be sufficient to engage compressor clutch via pressure switch.
 

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I just know that most of the old guys that work from home delivers a better job, charge less and knows more that most big businesses. Chances are these old guys worked at at a dealership or big business before and have all the knowledge and courses and experiences behind them. Every cust leaving them is a potential new repeat cust and will bring in a lot more cust by word of mouth. My SIL vehicle had a problem after the guarantee expired. He took the vehicle back 4 times and aircon problem still exist. Then a friend direct him to the old guys. Old guy said start vehicle. Within 5 sec he diagnosed problem and 5 ninutes later it was solved,

Chines trick is to find this guy
 

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As said the machine will test for leaks and won't re-gas if it failed the vacuum test.
Had this problem when i had the e46 and it was an inline pressure sensor.
Mine was in the pipe just behind the os headlight and didn't lose any gas when changed it has a valve to stop that.
 

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Discussion Starter · #13 ·
Thank you so much everyone for all the help and advice - all very much appreciated. This is a great forum and I'm so pleased I found it. I've found some local aircon service garages and for around £50/£60 they can inspect and access what the problem is - so they say anyhow - so I think I'll give that a go. At least I can talk to them now with a little more knowledge about the various components of the system and how it works. Many thanks again!
 
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