Originally Posted by TexasMarine
Thanks for the reply. My tech tested the pressure and had 40 lbs. on the low side. It that sufficient?
Depends on the ambient temperature, but generally yes. That means it has some quantity of Freon. However, the compressor may start and then immediately shut off because there isn't enough, and the low (suction side of the compressor) side pressure gets too low. So pressure only isn't enough to tell what the freon level is. Other problems may be that low side pressure switch has gone bad, the compressor clutch has gone bad, the evaporator coil temperature sensor has gone bad (if it has one), the high limit cutout switch has gone bad, or the controls themselves have gone bad. However, always start with the fuse. I guarantee there is one somewhere. It is usually in one of the chassis or dashboard fuse blocks.