A Kelon old air conditioning, fluorine mouth, there is no needle, how to measure the pressure and fluorine ah? No thimble tube screw, no response, how should I test? Thank you
Stop valve, valve, loosen a little bit on the deal!
Inside the six angle valve clockwise turn to the point, plus good, and then shut to death, OK
The fluorine pipe should be screwed up, and there should be pressure when the valve is closed. You try. Better boot first.
