Prepare HVAC systems for summer with a comprehensive pre-season preventive maintenance checklist. Inspect package units and related equipment for cabinet integrity, wiring, refrigerant and oil leaks, and sensor accuracy. Clean and straighten condenser and evaporator coils, replace belts and air filters (MERV 8 or LEED-required MERV 13), and clear drain pans and lines. Verify compressor, fan, VFD, and pump operation; record amps, pressures, and temperatures; test safeties and controls; and document findings and actions.
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