A/C Question and maybe a problem
07-08-2007, 01:14 AM
#1
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A/C Question and maybe a problem
Well I have A/C on my 94 GT 5.0. I went ahead and added some freon and the oil and all the good stuff.The A/C hasnt been used in over a year. Now when I put the freon and stuff in it the compressor kicked on but no cold air. It holds pressure in the line, no leaks ,so I thought I was good till I read the back of the bottle. It shows that the lines can get clogged. So I am assuming that thats what happento mine. If any one knows about A/C let me know. I didnt think that A/C lines could get clogged. Im taking that i will have to go get a performance check on it and have them blow the lines out. Any help guys TIA
07-08-2007, 01:28 AM
#2
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
RE: A/C Question and maybe a problem
Is your cooling fan working meaning the one on the front of the engine. if not is won't be able to remove heat fron the condensor and the pressures will sky rocket causing a lack of cooling expecially in stop and go traffic or sitting still?? you really need to hook a set of gauges up to it and check the pressures if there is a clog the low side will be drawn into almost a vaccum and you'll see that on the gauges happening. without hooking a set of gauges up it'll be hard to determine root cause. I assume this car is equipped with 134a and not r-12 if not was the conversion done??
07-08-2007, 01:37 AM
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RE: A/C Question and maybe a problem
ORIGINAL: mjr46
Is your cooling fan working meaning the one on the front of the engine. if not is won't be able to remove heat fron the condensor and the pressures will sky rocket causing a lack of cooling expecially in stop and go traffic or sitting still?? you really need to hook a set of gauges up to it and check the pressures if there is a clog the low side will be drawn into almost a vaccum and you'll see that on the gauges happening. without hooking a set of gauges up it'll be hard to determine root cause. I assume this car is equipped with 134a and not r-12 if not was the conversion done??
Is your cooling fan working meaning the one on the front of the engine. if not is won't be able to remove heat fron the condensor and the pressures will sky rocket causing a lack of cooling expecially in stop and go traffic or sitting still?? you really need to hook a set of gauges up to it and check the pressures if there is a clog the low side will be drawn into almost a vaccum and you'll see that on the gauges happening. without hooking a set of gauges up it'll be hard to determine root cause. I assume this car is equipped with 134a and not r-12 if not was the conversion done??
07-08-2007, 01:57 AM
#5
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
RE: A/C Question and maybe a problem
The low side pressures will vary depending on temperature and humidity outside as will the high side.generally 25-35 on the low side is acceptable and 175 to 250 on the high. but temperature will affect these numbers . the little arresol cans you buy at autozone aren't the most accurate excpecially if it's built onto the can. you need a set of gauges that have high and low side pressures side by side. if there is a blockage you'll see it on the gauges usually an expansion valve not working or an orifice tube plugged. these two devices are what meter / control the flow of freon in a system your car either has one ot the other. you cant see an orifice tube as it's installed inside a line at a connection. if it's electric the fan should be on when the a/c is on. also if you over charged the system you'll have to evacuate the whole system and recharge with exact amount. to much oil and freon in the system will effect it's ability to cool. MORE IS NOT BETTER IN THIS CASE FOR FREON!!!
07-08-2007, 02:09 AM
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RE: A/C Question and maybe a problem
ORIGINAL: mjr46
The low side pressures will vary depending on temperature and humidity outside as will the high side.generally 25-35 on the low side is acceptable and 175 to 250 on the high. but temperature will affect these numbers . the little arresol cans you buy at autozone aren't the most accurate excpecially if it's built onto the can. you need a set of gauges that have high and low side pressures side by side. if there is a blockage you'll see it on the gauges usually an expansion valve not working or an orifice tube plugged. these two devices are what meter / control the flow of freon in a system your car either has one ot the other. you cant see an orifice tube as it's installed inside a line at a connection. if it's electric the fan should be on when the a/c is on. also if you over charged the system you'll have to evacuate the whole system and recharge with exact amount. to much oil and freon in the system will effect it's ability to cool. MORE IS NOT BETTER IN THIS CASE FOR FREON!!!
The low side pressures will vary depending on temperature and humidity outside as will the high side.generally 25-35 on the low side is acceptable and 175 to 250 on the high. but temperature will affect these numbers . the little arresol cans you buy at autozone aren't the most accurate excpecially if it's built onto the can. you need a set of gauges that have high and low side pressures side by side. if there is a blockage you'll see it on the gauges usually an expansion valve not working or an orifice tube plugged. these two devices are what meter / control the flow of freon in a system your car either has one ot the other. you cant see an orifice tube as it's installed inside a line at a connection. if it's electric the fan should be on when the a/c is on. also if you over charged the system you'll have to evacuate the whole system and recharge with exact amount. to much oil and freon in the system will effect it's ability to cool. MORE IS NOT BETTER IN THIS CASE FOR FREON!!!
07-08-2007, 02:21 AM
#8
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RE: A/C Question and maybe a problem
ORIGINAL: mjr46
WTHOUT GAUGES it'll be hard to work on an a/c system. probably have to take it to a shop.
WTHOUT GAUGES it'll be hard to work on an a/c system. probably have to take it to a shop.
07-08-2007, 02:35 AM
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RE: A/C Question and maybe a problem
ORIGINAL: mjr46
yes they will have what is needed to check it out. and flush the system if needed. we have all the proper stuff at my shop do do a/c repair
yes they will have what is needed to check it out. and flush the system if needed. we have all the proper stuff at my shop do do a/c repair