To recharge the air conditioning system on a 1991 AC 740 wagon, first locate the low-pressure service port, usually found on the larger diameter aluminum line. Attach a refrigerant can with a hose and gauge to the port, following the manufacturer's instructions for the type of refrigerant used (typically R-12 or R-134a). Start the engine and turn the AC to the maximum setting, then slowly open the valve on the refrigerant can to allow it to flow into the system. Monitor the pressure gauge and avoid overfilling; once the system is adequately charged, disconnect the hose and replace the service port cap.
Next to AC accumulator/drier, which is in the engine bay in front of the firewall. When looking from the front, it is on the left side of the car, an aluminum cylinder approx. 4 inches in diameter.
i have a 1989 740 and mine is located on under the hood it the green 1 on the side next to the air filter
Recharging the air conditioning is simple with a recharge kit. Connects the Freon bottle to the recharge port on the air conditioner compressor. Release the Freon into the compressor.
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No, you cannot recharge a window AC unit with refrigerant yourself. It requires a professional HVAC technician to safely and properly recharge the refrigerant in an AC unit.
91 will have r-12 freon but can be converted to r-134a easily
Take it to a garage that services ac. If it needs a recharge it must have a leak in the system.
Remove the spare tire and the plastic cover in the frunk high and low side are both right there.
you can use r134 freon add a/c oil
Yes.
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