A/C Low Pressure Port - Could anyone ID it?
04-20-2006, 06:49 PM
#1
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A/C Low Pressure Port - Could anyone ID it?
Could anyone identify where's the Low Pressure Port for the A/C?
I found 2 port with black dust cap and 1 with a gray dust cap and a letter "L" on it. Its already 85F here in L.A. and the AC is not working, plan to add some R134A..... help.
MarkC4S
96 993C4S Polar Silver
I found 2 port with black dust cap and 1 with a gray dust cap and a letter "L" on it. Its already 85F here in L.A. and the AC is not working, plan to add some R134A..... help.
MarkC4S
96 993C4S Polar Silver
04-20-2006, 07:07 PM
#2
Three Wheelin'
You found the port. The high side port is a different size on the compressor so there is no chance that you will accidently charge the system by plugging into the high side port.
07-19-2014, 09:38 AM
#3
With R134a service ports, the larger diameter is the high and the smaller diameter is the low (Images below compliments of Pawlik Automotive Repair, Vancouver, BC, Canada, and Two Fourths Full Blogger); in the images below the service hose/coupler with the red **** is on the high side and the blue one is on the low side.
Although R134a service ports are different is size you can easily screw up by charging through the wrong ports, so read and understand the procedures before you start to play. If you are messing around with refrigerant cans you purchased at your local auto parts store you will want to charge through the low side port, smaller port.
The correct thing to do is to evacuate the system (vacuum) and then charge it, and then locate the leak with an electronic leak detector sniffing all the joints and components; most common leak on a 964/993 is the evaporator.
Feel free to PM
Although R134a service ports are different is size you can easily screw up by charging through the wrong ports, so read and understand the procedures before you start to play. If you are messing around with refrigerant cans you purchased at your local auto parts store you will want to charge through the low side port, smaller port.
The correct thing to do is to evacuate the system (vacuum) and then charge it, and then locate the leak with an electronic leak detector sniffing all the joints and components; most common leak on a 964/993 is the evaporator.
Feel free to PM
Last edited by griffiths; 07-20-2014 at 09:25 AM.
