I bought an acmanifold guages it has 3 hoses yellow green an red i know red is for freon thanks any tips ?

Answer 1

oh my return them and take it to a professional. are the r134a gauges ??? r12 gauges ??? there are three hoses and two gauges. a hi-side gauge and a low side gauge. the hoses corispond to the gauge in which red would be hi-side, blue (in your case green) low side and yellow is for the freon. DO NOT open the red valve when the vehicle is running with the ac on as it will over pressurize the can of freon and blow up and they are neat little granedes. That being said, you should only charge from the low side running, in the event the compressor wont kick on because the system is to low, jump the low pressure switch and then it will suck in the freon