Question. I am using a can of A/C pro on my wife's car. It is a Chevy Equniox. For some reason when I hook up the coupler the gage just goes flat and reads nothing. If I squeeze the trigger it shoots into the red zone but goes back to nothing once I let go.
Does that mean it is fully charged or basically fully empty? Also the compressor is cycling but for a seconds at a time only and very rarely. My wife who was in the car said it did blow cold air but it is not doing so now and at one point the needle rested at almost six o clock rather than on the stopper so I am thinking it is just incredibly low.