AC refrigerant pressure reading
07-23-2006, 11:21 PM
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1997 E320
AC refrigerant pressure reading
I was diagnosing my AC and I was wondering what the refrigerant pressure should read at the low pressure side where you charge the AC from or at the digital reading from the climate control. The low pressure service port shows 23-24 psi and the digital reading shows 22-25. when I typed 25 in the AC diagnostic tool posted in the forum it said that 25 is low and may need to be recharged. To what pressure should the low side service port be charged? thanks
07-24-2006, 01:46 AM
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The correct range should be 32-36 psi
Originally Posted by koskesh
I was diagnosing my AC and I was wondering what the refrigerant pressure should read at the low pressure side where you charge the AC from or at the digital reading from the climate control. The low pressure service port shows 23-24 psi and the digital reading shows 22-25. when I typed 25 in the AC diagnostic tool posted in the forum it said that 25 is low and may need to be recharged. To what pressure should the low side service port be charged? thanks
07-24-2006, 01:21 PM
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Thanks for the info. One thing though, the gauge I use to recharge the AC with shows anything over 25 in the red zone meaning the system is over charged, which is the main reason I didn't put more than 25 psi in there. so it should be safe then going to 32-36 psi range? thanks.
07-24-2006, 01:40 PM
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I think if you start your car up, have A/C running for a while, then measure, then 30-40 should be good. That's what my tech show me.
Don't measure w/ AC off, reading is not that valid.
Don't measure w/ AC off, reading is not that valid.
Originally Posted by koskesh
Thanks for the info. One thing though, the gauge I use to recharge the AC with shows anything over 25 in the red zone meaning the system is over charged, which is the main reason I didn't put more than 25 psi in there. so it should be safe then going to 32-36 psi range? thanks.
07-24-2006, 01:57 PM
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.... nothing to brag about, it is a previous model....
Originally Posted by zam2000
I think if you start your car up, have A/C running for a while, then measure, then 30-40 should be good. That's what my tech show me.
Don't measure w/ AC off, reading is not that valid.
Don't measure w/ AC off, reading is not that valid.
seriously, I didn't know what's the correct PSI, but you sure it is that high?
I thought Over 25 is consider too high?
