Question about Cadillac STS
Check first for leaks by using soap suds over the lines for the high and low of the AC system. An obvious sign of leak is oil coming out of the line or valves or at the AC compressor itself. If there are none then start the engine, set the AC and blower to high and connect the pressure gauge (make sure you have the dual one for the high and low so you can address both at once) and start adding freon.
If you only have a single gauge, have it connected to the low pressure side. See video below for additional reference.
Posted on May 22, 2011
I always discourage people from repairing any A/C work unless trained prior. Not only is the refrigerant bad for the air we breathe if it's released into the atmosphere but you can serious hurt yourself as the stuff is under pressure and if can give you frostbite if it gets on bare skin.
Here's the thing, the refrigerant isn't suppose to go low on it's own. It leaks out. "recharging it" doesn't fix the problem it just makes it work awhile. You need to find the leak and that's usually done by adding an amount of refrigerant to the system and then using a refrigerant sniffer or leak checker to find the leak.
I recommend taking your car to an A/C shop to be fixed right.Whatever you do don't go and buy a "recharge kit" from the auto parts store and just charge it. Most of the time these kits have junk in the refrigerant like dye and extra oil the system doesn't need and it makes things worse.
Let me know,if needed further assistance.
Hope i helped you.
Thanks for using ' Fixya ' and have a nice day!!
Posted on May 21, 2011
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Posted on Jan 02, 2017
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