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Service Type: Demand Service – No Cooling Status at Arrival: System running continuously but not reaching set temperature Tenant Note: Just moved in the day before; reports cooling issue despite system running ⸻ Diagnostic Summary: • Thermostat reading: 4°F above setpoint upon arrival, indicating system unable to maintain temperature • Temperature split: 18°F (Supply air at 64°F), measured at garage upflow furnace • Compressor: Producing unusual noise • Refrigerant pressures: Low side reading in the 170s PSI – abnormal for R-410A system • Furnace & interior check: Found a 3°F heat gain, same at supply—indicating poor insulation or duct issues • System mismatch discovered: • Evaporator coil is R-22 • Outdoor condenser (2016) is R-410A • Incompatible refrigerant types—system not properly matched ⸻ Recommendations: • Evaporator coil is incompatible with the outdoor R-410A unit and must be replaced • Due to compressor noise and potential compressor failure, highly recommend