I have a problem with my 00' Civic A/C. The problem would be when I get at a stoplight or at idle the car begins to blow warm air. I checked if the fan was working and it does. Could it be the fact that I only put 12 oz. of R-134 and I need to put another 12 oz. of it? The thing is that when I checked the gauge on the refrigerant it goes all way to the red side of the gauge. So I'm like a little scared of adding another can. Any help will be greatly appreciated.

 

those cans dont do ****...your system is over filled..take it to a shop and get it evacuated and recharged