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Old 04-15-2008, 02:12 PM   #1
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Default What is the correct pressure to charge A/C to?

My a/c is blowing outside temp air. I got a recharge kit with the little gauge and it read around 10 psi or whatever those gauges read in. I got it charged up to around 25 but I need to get another can to finish it I think. What pressure should I be looking for to get a proper charge on the system?

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Forgot to add, this is a 2000 SLE
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Old 04-15-2008, 04:21 PM   #2
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Lots of good info here: http://www.aa1car.com/library/ac_recharging.htm

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LOW pressure gauge: When the reading is between 25 and 40 psi with the A/C running, STOP. The system is fully charged and should be cooling normally. DO NOT add any more refrigerant. If the gauge is over 50 psi, you have overcharged the system with too much refrigerant.

High pressure gauge: When the reading gets up around 200 to 225 psi (R12), or 225 to 250 psi (R134a), STOP. The system is fully charged and should be cooling normally. DO NOT add any more refrigerant.
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Old 04-15-2008, 08:43 PM   #3
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Perfect, I charged it to about 33 psi and I'm getting nice cold air again.
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