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I an Hvac system with low performance. Suction pressure is 10 psi and 125 on the hi side. the suction line is iced over from the unit to the a-coil and the a-coil itself. please advise
Thawing as we speak and I can get refrigerant on Monday. I have no idea how to measure a proper charge or how much oil to add if any. had a service out here two days ago and they said they added some and didn't want to add more because the pressures were to high, when I checked they seemed low.