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Should I add more R-12 freon...or is my A/C ok?
#1416795
04/08/13 03:18 PM
04/08/13 03:18 PM
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Joined: Jan 2013
Posts: 77
Louisiana
rnch
OP
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OP
member
Joined: Jan 2013
Posts: 77
Louisiana
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I added one can of R-12 to my new-to-me '85 ram's A/C yesterday.
The low side is 25.
A/C center vent temp is 42 degrees.
Outside temperature 75 degrees, humidity 50 percent.
Waddyathunk?
Last edited by rnch; 04/08/13 03:20 PM.
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Re: Should I add more R-12 freon...or is my A/C ok?
[Re: rnch]
#1416796
04/08/13 04:41 PM
04/08/13 04:41 PM
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Joined: Jan 2003
Posts: 25,743
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,743
Rio Linda, CA
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Is the sight glass clear?
The INTERNET, the MISinformation superhighway
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Re: Should I add more R-12 freon...or is my A/C ok?
[Re: John_Kunkel]
#1416797
04/08/13 05:54 PM
04/08/13 05:54 PM
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Joined: Jan 2013
Posts: 77
Louisiana
rnch
OP
member
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OP
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Joined: Jan 2013
Posts: 77
Louisiana
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Quote:
Is the sight glass clear?
94% of the time; just a little bit of "foam" when the compressor cycles on. Then a tiny bit every now and then.
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Re: Should I add more R-12 freon...or is my A/C ok?
[Re: rnch]
#1416798
04/08/13 08:23 PM
04/08/13 08:23 PM
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Joined: Oct 2005
Posts: 1,305
Lakewood, Colorado
herkamer
pro stock
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pro stock
Joined: Oct 2005
Posts: 1,305
Lakewood, Colorado
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83 FSM shows
70F:
18-30psi Low side
Discharge air temp: 38-50
80F:
20-35 psi
Discharge temp: 42-54
I say run it
Matt
69 Dart Swinger 340
83 W350, Megasquirted with 46RH
Old news: 72 Demon street/race mobile
Latest: 70 Duster backhalf car
and even more
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Re: Should I add more R-12 freon...or is my A/C ok?
[Re: herkamer]
#1416799
04/08/13 09:23 PM
04/08/13 09:23 PM
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Joined: Jul 2003
Posts: 6,167
Maryland
GO_Fish
master
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master
Joined: Jul 2003
Posts: 6,167
Maryland
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If it's very low, the compressor will cycle on and off quickly. When you have a decent charge, the compressor should kick in and stay engaged for a while.
Scott B.
"I'm a self-made man... I started with nothing, and I still have most of it!"
68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph
69 340 GTS stock 14.18@ 95.60 mph
01 5.9L Ram 1500 Quad Cab 4x4
01 3.5L 300M 16.23@ 86.97 mph
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Re: Should I add more R-12 freon...or is my A/C ok?
[Re: herkamer]
#1416800
04/09/13 11:54 AM
04/09/13 11:54 AM
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Joined: Jan 2013
Posts: 77
Louisiana
rnch
OP
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OP
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Joined: Jan 2013
Posts: 77
Louisiana
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Quote:
83 FSM shows
70F:
18-30psi Low side
Discharge air temp: 38-50
80F:
20-35 psi
Discharge temp: 42-54
I say run it
I think I will!
IMO there is no such thing a "TOO Cold air conditioner" here in Hot & Humid New Orleans, LA, USA.
But, having said this, I'm not going to waste most of another can of R-12 to get another 2 or 3 degrees colder vent temperature.
Also, I am concerned about putting anymore pressure on/in those factory hoses, condensor and evaporator than I have to.
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Re: Should I add more R-12 freon...or is my A/C ok?
[Re: herkamer]
#1416802
04/10/13 04:18 PM
04/10/13 04:18 PM
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Joined: Jan 2013
Posts: 77
Louisiana
rnch
OP
member
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Louisiana
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I drove the truck yesterday and today. It's in the low 80's today here in New Orleans, very humid also. The truck's A/C is more than adequate. 'course the True Test will be late August/early September, when the Heat AND Humidity are in the mid/high 90's. 
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