 amount of refrigerant and we found out that the system was low, about a half pound of the R134A refrigerant. So after 10 minutes with the AC running, we measured the temperature out of the vents and it was 45 degrees, so it was cold. We removed the equipment, shut the hood, backed the Honda out of the shop and then noticed that the air wasn't blowing cold anymore. So back into the shop for a recheck and