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Next, turn on the system and slowly open the valve on the charge hose to allow the refrigerant to flow into the system

r134a u charge hose with gauge. Watch the gauge on the charge hose to monitor the pressure in the system. You want to add enough refrigerant to bring the pressure to the correct level, but not too much that it becomes overcharged.

r134a u charge hose with gauge. Watch the gauge on the charge hose to monitor the pressure in the system. You want to add enough refrigerant to bring the pressure to the correct level, but not too much that it becomes overcharged.