Testing for refrigerant charge; refrigerant oil; combustion and draft; amperage draws; temperature differential, etc. Inspecting for worn or failed parts; oil level; safety controls; valves; water, oil and/or refrigerant leaks, etc. Professional recommendations   Cleaning coil surfaces; electrical contacts; burners; blower wheels and housing; combustion chambers; pilot assemblies; heat exchangers; condensate drains and pans, etc. Lubricating motors; damper and fan bearings, etc. Aligning drive couplings, belt drives, etc. Tightening mounting bolts; refrigerant piping fittings; electrical connections, etc. Adjusting super heat; fan RPM; best tension; set point of controls; chemical feed; gas pressure; sump floats; damper close-off, etc. Calibrating temperature and pressure controls; safety controls, etc. Painting for corrosion control, etc     24-hr availability, 7 days a week Preferred customer rate with no overtime Priority response Maintains all insurance requirements (Liability & Workers Comp) Maintains current Air Conditioning & Plumbing Licenses Filter inspection Filter cleaning and/or replacement as needed.   Oils and lubricants Cleaning supplies and paints Filters