Question about 2005 Kia Optima

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Hi, my husband and i have a 2006 optima. te ac

Hi, my husband and i have a 2006 optima. the ac stopped blowing cold air. we purchased a can of freon recharge at the wally mart. we followed the directions and the results were as follows.

-compressor still turns on and fan still blows
-the low side pressure was like 10 on the gauge
-while injecting the freon we could hear it blowing out the front of the car somewhere -so we stopped seemed a waste of product

my husband and i do all of our own car work and was wondering is it possible and safe to replace the high ac line ourselves. then safely and effectively recharge it ourselves. or will we have to have all the work done at a garage cause it is under pressure

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Yes its safe to replace replace the lines when you get the replacementlines make sure you get new O rongs but once u replace them you have to have your lines vaccumed for 10 min te see if it holds pressure if it dont then u still have a leek if it holds pressure then you can put your freon in it make shure you dont over charge because it will blow your pump

Posted on Jun 27, 2009

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Absolutely not!  Never attempt to recharge from the high side. Recharging from the high side is extremely dangerous and could do harm to both you and the car.  If the low side pressure is only 10psi, you are low on refrigerant.  Most cars require 20psi to operate the compressor and should never fill to more than 40-45psi unless recommended by the manufacturer.  I'd re-check the pressure readings.  It's possible that instead of charging the system, while hooking up the hose, you've let freon escape, accounting for the hissing noise and the low pressure reading.  When recharging the AC system, it's important to have the car running and have the AC on high.  It's possible, you didn't have a good connection to the low side which also would account for the escaping refrigerant.  I hope this answers your question.  I'd try to recharge the system again on the low side, making sure the connection is good both at the low side valve and on the can of refrigerant.  Best of luck.
Greg

Posted on Jun 27, 2009

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