Freon pressure ?
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Elder User
Joined: Oct 2002
Posts: 573
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From: Medina, Tn.
Freon pressure ?
My A/C is not working to my likings. Does anyone happen to know what the freon pressure should be at the accumulator ? It is R12 if that matters. It will not cool and NO, I have not taken it anywhere yet. Mine is showing about 185 when I check the pressure with an A/C pressure tested that I bought. I'm not cheap, I just don't want to take it to someone just for them to drain some out and tell me that it was over charged. Heck, I can drain some out myself. I know, it not what Al Gore or any of the other environmentalists would do but such is life. Sorry for thinking mean thoughts about Mother Earth.
Thanks for the info.
Thanks for the info.
New User
Joined: Jun 2003
Posts: 7
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Freon pressure ?
I dont know the answer as Im just going down this path myself, but I found this board that seems to have the AC experts:
http://www.aircondition.com/wwwboard/index.htm
Good luck!
Jim
http://www.aircondition.com/wwwboard/index.htm
Good luck!
Jim
Elder User
Joined: Jul 2003
Posts: 870
Likes: 1
From: Upstate NY Rochester
Freon pressure ?
Hey guys! R12 has been banned for use in North America. You may find someone that can take care of you. Preferably a shop that does automotive A/C systems.
Advice. DON'T get caught releasing ANY refrigerant into the atmosphere! Fines these days are averaging 50 grand! And for the person who turned you in? 10 grand! Heck, I'd turn you in for a grand!
Talk to you guys later.....
Advice. DON'T get caught releasing ANY refrigerant into the atmosphere! Fines these days are averaging 50 grand! And for the person who turned you in? 10 grand! Heck, I'd turn you in for a grand!
Talk to you guys later.....
Elder User
Joined: Jul 2003
Posts: 870
Likes: 1
From: Upstate NY Rochester
Freon pressure ?
Hey Frank! Thanks for getting back to us.. I was just busting your chops man. It was a bit late when I posted the reply. Have you got any pics of your rig you can post?
Thank you sir and we'll talk with you later....
Thank you sir and we'll talk with you later....
Posting Guru
Joined: Aug 2002
Posts: 1,729
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Freon pressure ?
You can still get R-12 although it is very very very expensive. Your best bet would be to take it to either a garage or a HVAC shop and have them swap it over to R-134A or hotshot.
Then if you get low you can go to Wal-mart or about any other store and buy a can of it (R-134A) and add it to your system. Whatever you do DO NOT MIX the different refrigerants. They don't play well together.
Funny, I had to go thru classes, tests out the wazoo, and pay big bucks to get my refrigerant lisence...and yet any joe can go to napa and buy a 12oz can of it
Then if you get low you can go to Wal-mart or about any other store and buy a can of it (R-134A) and add it to your system. Whatever you do DO NOT MIX the different refrigerants. They don't play well together.
Funny, I had to go thru classes, tests out the wazoo, and pay big bucks to get my refrigerant lisence...and yet any joe can go to napa and buy a 12oz can of it
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Cross-Country
Joined: May 2002
Posts: 65
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From: Spokane US
Freon pressure ?
I think that's what the shops are charging around here for R12. Be careful trying one of those home conversion kits - I tried to convert mine and ended up toasting most of the A/C parts. So now I have a nice warm ride home!
A few years ago, Costco was selling R12 by the case for cheap - and not checking to see if the purchaser had a license to buy it! I don't know anyone who has any left, but some of my friends bought as much as they could afford until Costco realized what they were doing!
A few years ago, Costco was selling R12 by the case for cheap - and not checking to see if the purchaser had a license to buy it! I don't know anyone who has any left, but some of my friends bought as much as they could afford until Costco realized what they were doing!
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Elder User
Joined: Oct 2002
Posts: 573
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From: Medina, Tn.
Freon pressure ?
Thanks for the help guys. Everyone is nutty from time to time. I don't have time to look at it now but maybe over the weekend. I spent about $1100. a couple of Summers ago replacing everything except the lines so I am wondering if it could be something vacuum related. GOD only know because Frank has no idea.
Thanks again,
Thanks again,
Junior User
Joined: May 2003
Posts: 56
Likes: 2
From: Katy, TX
Freon pressure ?
AC system pressures require a manifold guage set to measure both high and low side pressures. Either by itself is not adequate to assess system health or lack thereof. You also need a small temperature gauge to measure air temps. I would read a basic book on auto AC before attempting any charging. You can overcharge and hurt yourself in the worst case.
If compressor is engaging and you are getting some cooling, then you may only need to add some R12 to get back to good cooling.
Measure pressures w/ engine fully warmed, AC stabilized for 5 minutes, max AC, Max Fan, doors and windows closed, and truck in the shade. General guideline for R12 pressures is High Side = 2.2-2.5*AirTemp degF entering condensor, Low Side = cabin air return temp degF - 10-15 psi. So if air temp is 90F then high side should be ~198-225 psig, Low side w/ 50F air from vents should be about 35-40 psi. Pressures measured shortly before the compressor cycles off.
good luck
If compressor is engaging and you are getting some cooling, then you may only need to add some R12 to get back to good cooling.
Measure pressures w/ engine fully warmed, AC stabilized for 5 minutes, max AC, Max Fan, doors and windows closed, and truck in the shade. General guideline for R12 pressures is High Side = 2.2-2.5*AirTemp degF entering condensor, Low Side = cabin air return temp degF - 10-15 psi. So if air temp is 90F then high side should be ~198-225 psig, Low side w/ 50F air from vents should be about 35-40 psi. Pressures measured shortly before the compressor cycles off.
good luck