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Hello, my 94 Fleetwood's AC doesn't blow cold air. I jsut bought R-134a refrogerant + oil. The can I bought says, charge from the low pressure port.I found 2 black caps. One is on the narrow pipe near the condenser, and the other on is on the accumulator. Which port should I use? Where is the low pressure port located? Would you please help me?
Posted by: MAC1
The low pressure side is the valve at or near the dryer on the passenger side. The low side line will have a larger diameter than the high side. You should see a black cap (if it's still there) on the dryer. Connect the charge to it and dispense according to manufacturer's instructions. The general procedure is to start car, turn a/c on high, connect charge on low side, turn can upside down and dispense. Also, you should have a pressure gauge because you don't want to over charge the system. The gauge will be color coded to tell you when there's a full charge. Overcharging could be dangerous and/or cause other problems
Posted by: BAIKINMAN
Hi MAC1, thank you for the reply. I will check it again. Yes, I got a gauge too. Is the dryer the same thing as the accumulator? I see the black cap on it. It's on the passenger side. I attached the photos of the dryer/accumulator. Is this the thing you were talking about? Thank you.
