Very strange. Whenever I first start my civic, the air conditioner works. However, after about 5 minutes it no longer cools. Whenever I start a cold engine, I can see the AC clutch spinning. However, as the engine warms up, after about 5 minutes, the clutch disengages. At the low pressure port, without the AC on, the static pressure is around 80.

Someone help??

 

Compressor not engaging when hot is usually because the clutch gap is too wide. Remove the clutch plate and take some of the shim washers out. You can do that with the system still charged.