Started with cleaning condenser out of any debris in coil. I checked starter (good), fuses (good), refrigerant had sh 40, sc 0. Checked coil (good), did see oil residue at bottom of drain Pan. I added leak sealant into system, then I added 6 oz of refrigerant. I noticed my txv was slammed every time I put in a ounce of refrigerant. My temperatures would drop dramatically then rise back up. Charging today for just leak sealant today. Will return for 3 ton coil installment.