* pac048h1321 4 ton ,r22,* freezing up , 25 low side 175 high side ,refrigerant charge 8 lbs what it calls for. after 1 min of running it is freezing up.
It acts like it is low on freon but in you add more very little change in pressure. No suction filter on this unit , high side has muffler and dryer
blower fan working. Compressor seems to be work OK. if you go by inlet air temp I should be running at least 70 on low side what should I check next?
thanks for any help Ed