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Noticed this year my aircon is not getting as cold as last year, The van has done 100K and has never been re-gassed, Im thinking this may be the issue.

Is this something we can do ourselves and if so, what's the best product to use, seems to be lots of options for DIY re-gassing out there.
 

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Whilst the belt and braces method is to take it to a specialist, have leak dye dosed, find and repair the leak, have the system vacuumed out and the exact weight of refrigerant and oil put back in, I found the STP EZ Chill kit sold in Halfords to work absolutely fine in loads of vehicles. And it has leak sealant that actually works! My Audi A6 developed a bad leak that depressurised the system within a week, the first dose worked for a couple of weeks, then packed up. Second dose worked, and is still working absolutely fine 2 years later!
Some people might get **** about having the exact weight of refrigerant in, but that all goes out of the window if you have a leak, and they are notoriously difficult to find, especially if they are in the evaporator, as that is buried deep inside the dashboard.
Leak sealer and several recharges £60. New evaporator £1000000000000000!!!!
Most 'fixes in a can' are at best polishing a turd, and at worst snake oil, this one actually works 😀
 

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There is a fair bit of leeway regards the amount of refridgerant, I had to have the condenser / a.c rad replaced and the guy overgassed it. It kept going off on high pressure, let some gas out and it’s been fine since. If you use a diy kit it has to have PAG oil in it for car a.c, ordinary refridgerant doesn’t work as well.
 

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Geez, sounds like the wild west there, in Australia we have rules, laws, and fines regarding car, domestic,
or commercial air conditioning, servicing etc has to be licensed, refrigerant into the atmosphere a big no-no,
It is not the same there ? as for overcharging systems, will they warrant for failed compressors doing that.
Leak sealer for air conditioning - again geez, see the pile of failed TX valves, failed compressor control valves.
For jdenver - it is up to you of course, but I would say have it serviced by a known reputable a/c shop.
 

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There are laws and licences in the UK for working on AC, but mostly this surrounds commercial installations, although I think garages are now supposed to have someone with a F-gas licence, but lots don't bother. It is also illegal to vent any AC gas to the atmosphere.
Vehicles now use R134a, which is a zero ozone depletion gas, although it is still a greenhouse gas, presumably developed, as all vehicle AC systems leak to a greater or lesser extent.
Whilst you need a licence to purchase all CFC gases, R134a seems to have various loop holes surrounding it's purchase, hence the legal availability of small quantities for DIY use.
Unfortunately there are a lot of garages that claim to be able to properly service AC, which actually just top it up with a DIY kit, and charge a fortune. The proper kit costs a lot of money.
As I said above, the belt and braces method is to take the vehicle to a specialist, but it could cost a lot of money to trace and repair leaks especially if its in the evaporator (dashboard out, on most vehicles, massive job!) and then you could be in the realms of paying far more than the vehicle is worth if it's an older vehicle.
I have never come across anyone who has had their AC components fail, after using EZ chill.
 
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