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Demand Service Report Unit Serial Number: W2M1650737 (Bedroom Unit) Issue Reported: Upon arrival, the client directed me to the condenser unit, where the refrigerant lines were visibly frozen. He also mentioned that one of the guest bedrooms was not cooling properly. Diagnostics and Findings: • Inspected both thermostats and found a 5°F discrepancy between the set temperature and actual room temperature. • Inspected the iced-up system and found the evaporator coil frozen. • Replaced both 16x25 air filter, located within the furnace/ garage upflows • Checked refrigerant charge on the affected system and found it was slightly low on refrigerant. • The system uses R-407C, a substitute for phased-out R-22. Repairs and Recommendations: • Informed the client that R-22 is no longer available and its substitutes, refrigerants including R-407C, are phased and no longer unavailable. • Added 2 lbs of R-407C to bring refrigerant pressures back within normal operating range. • Verified