Review on Advanced Aain LX14 R134 Diagnostic A/C Manifold Gauge Kit: High-quality HVAC Gauge Set with 5FT Hose for R134A, R404A, R407 Refrigerants by David Caldwell

Hose and valve work fine. After I emptied 2 refrigerant bottles, the pressure showed up in the green area. But after disconnecting the hose I noticed that the pressure gauge does not go back to 0 but stays in the green zone. Now I don't know if my air conditioner has good pressure or is still low. The air conditioning works with cool air, but not as much as it should.