2009 climate Master geothermal second floor system. Two stage three ton wired to run high stage full time. Equipment is very low on refrigerant charge with 78 PSI suction pressure. Freezing evaporator coil and homeowner says ice has been on the line set in the past. Visual inspection discovered a leaking high pressure service port Schrader core. Oil, crusty debris, and dripping oil are all present. Replace Schrader core Repressurize with 54 Oz new or 410A Inject Max seal leak stop with ultraviolet dye Run test cooling mode. New refrigerant pressures are 110 and 257 with 16 superheat & 13 subcooling. Non pressurized flow center is maintenanced by homeowners and kept full, air filter is on schedule All equipment is back up to proper working condition. Any new refrigerant leaks can be monitored in the future with ultraviolet dye detection but NO follow-up is recommended at this time