AC recharged with Freon and good for a few weeks and not cold anymore,leak somewhere?

[summersky1984]

I took to the shop and recharged the AC with freeone, it was good and cold for a few weeks when driving, and now, the ac is not cold anymore, where can the leak be? any help would be great, thanks

 

[nigel]

Leak.
It's easy enough to change ALL the o-rings in the system to be sure they're all good.
You will be able to see residual oil from where it's leaking and if they put dye in, use a black light in the dark and it'll jump out at you but you should change all the o-rings to the green, high pressure ones anyway.

Cheers
nigel

 

[summersky1984]

hi Nigel, what O-ring should I buy? and how many?thanks

 

[Jinks]

The couplings on both condenser coils are notorious for leaking from the o-rings. I'd buy them from Acura as they are hard to match from an auto parts store as I have tried. Use a soap bubble or electronic leak detector and always evacuate the system of moisture prior to charging. A new filter drier is highly recommended too to catch extra moisture. This should be a dealer or shop repair unless you have a vacuum pump to recover.
I am not a fan of dye detection. It gets everywhere and replaces capacity of refrigerant. Just an idea.

 

[nigel]

Any Honda dealer has all you need, just tell them you're doing R-134 and they should give you green o-rings. (high pressure)
No big deal if they aren't but if you want, any parts store has o-ring kits for the DIYer.
Be sure and use a lubricant on each one as you replace them so they won't bunch up or pinch.
I use DC-4 as i've access to it but you can use A/C compressor oil or anything slippery, just don't get excessive. Just enough to make the o-rings slippery.
Also, if your system has been wide open to the atmosphere for more than an hour or so, (and I mean tubes and hoses off and disconnected) follow the Honda M/M, but after doing the initial vacuum for leak check, let it evacuate again for at least 45 min., just to be sure ALL the air has been removed and / or replace the filter drier.
These systems are real simple and easy to access, so if you do it right they'll be good as gold for years.

Cheers
nigel

Cheers
nigel

 

[LJSB]

What year is this vehicle, how many miles? If the vehicle is a R-12 vintage has it been converted to 134a and if so do you know what was replaced and how it was done? Do you have a invoice that shows what was done? Lastly, where are you? Are you in the U.S.?

You very well could have a different problem(s) other than a leak.

 

[davidf]

A sniffer will be your best bet for the moment. If the system has dye then I would use the sniffer and the black light. The sniffer gets you in tight spots. Not to rain on your parade but evaps have been know to leak after 20+ years, I should know.
Most go back with 134 Freon. I went back with R12. I like it much better. Again, the sniffer. Sniff everything, even around the compressor clutch.