AC issue on my ISX

[bwake]

There are a few on here that have the right answer. The freon level in this system is low and needs to be set to the proper levels. The pressure of freon is proportional to the actual temperature of it. 28 to 30 psi is roughly at freezing point which will cause the system to freeze up like you are seeing. Have someone that knows what they are looking at fill the system to the proper amounts and see where that gets you. If it continues to go low, you will need to find your leak also, the schrader valves are notorious for leaking on the R134A ports. I'd also check the blower side of the evaporator to make sure that there is not a film of trash built up that is not allowing the proper amount of air to flow across the evap. If there is, simple green and a water filled squirt bottle work well to clean it.