Postby smj999smj » Tue Jun 20, 2017 12:29 pm
This is usually caused by insufficient cooling of the condenser, often because one of the fans is not working or there is blockage of air through the condenser core or the engine cooling system is running too hot, but, low refrigerant can cause this as well. I would start by making sure the electric fan is turning (and not turning too slow) when the A/C is on. Also, make sure the clutch fan is working, as well, and coolant level is good (the coolant gauge should be about halfway on the gauge. If those are good, the pressures should be checked to see if they are low, which would indicate a system leak. Generally speaking, the A/C system should never need refrigerant added to it unless there is a leak.