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[Andy A]

But where has the 800g of gas gone?

When was it last checked and gassed?

Last filled 4/8/10 according to a sticker. I've had the car for about 3 years and it was my sons friend who had it re-gassed in 20010.

[Doctor Gollum]

100g per year can be considered 'normal' if on the high side...

Don't forget most of the aircon system is made from aluminium, so not unreasonable for a 13 year old condenser to become slightly porous

[Andy A]

Good news my local garage that I trust has just started to offer a Free Air Conditioning Check to see if the air con is running efficiently. They also offer a free nitrogen pressure test to check for leaks in the system. They charge £49 for a re-gas.

I have a couple of questions.

If the system is opened to work on will the Dryer have to be replaced with new?

If yes does it have to be a genuine one or will a third party one be OK?

I will get two VX valves before I take the car up there.

Thanks

I didn't replace the valves come the end because there was still gas in the system.

I took the car in for the free air con check and the next thing I new it came back to me already re-gassed. No printout and no nitrogen pressure test done.

I had to ask how much refrigerant was left in the system and it was about 100g. I'm sure he didn't do a pressure test because he had the same 2 pipes from one machine to the air con connected from start to Finnish. 

I ask how much refrigerant did it take and he said 900g.

I've never had an air con re-gassed before. For what I have read I should have had a printout or does this depend on the garage?

Its running ice cold now.

Thanks

That's the standard 'fast fit machine' it may have done a vacuum test, but you wont know without the print out and you really needed a pressure test. With that much refrigerant gone it will almost certainly escape again - how  long it takes will give you an idea of where its getting out.

Steve

They did put a UV dye in it and said being that I am concerned about it I could go back in a couple of weeks and they will put an UV light on it to see if it has leaked.
 

[Andy A]

100g per year can be considered 'normal' if on the high side...

Don't forget most of the aircon system is made from aluminium, so not unreasonable for a 13 year old condenser to become slightly porous

Would that still show up with a UV light.

[Doctor Gollum]

Yes if there's dye in it

[Marks DTM Calib]

100g per year can be considered 'normal' if on the high side...

Don't forget most of the aircon system is made from aluminium, so not unreasonable for a 13 year old condenser to become slightly porous

Would that still show up with a UV light.

No as the dye is generally to large a molecule to get through any porosity

[Doctor Gollum]

Yes if there's dye in it Apparently not then

[Andy A]

100g per year can be considered 'normal' if on the high side...

Don't forget most of the aircon system is made from aluminium, so not unreasonable for a 13 year old condenser to become slightly porous

Would that still show up with a UV light.

No as the dye is generally to large a molecule to get through any porosity

Would they be able to find that type of leak with a sniffer device and or a pressure test?

Thanks