What's involved in checking your air conditioning?


Condensing Unit
Inspect cabinet, cabinet fasteners, and cabinet panels.
Inspect the required clearance (e.g.,service) around cabinet. Report instances where the cabinet does not meet the requirements.
Inspect electrical disconnect box. Ensure the case is intact and complete.
Ensure proper equipment grounding. Tighten, correct and repair as necessary.
Check line/low voltage. Compare to OEM specifications or equipment nameplate data.

If indoor airflow is within OEM specifications but TD is not check refrigerant charge using manufacturer recommended procedure. Adjust charge as necessary.
If applicable, check printed circuit for hot spots and other damage.
Inspect electrical connections and wire. Ensure wire size and type match the load conditions.
Tighten all loose connections and repair or replace any damaged electrical wiring.
Inspect motor capacitors.
Check amperage draw to motor/nameplate data (FLA) as available. If outside OEM rating or specification, inspect for cause.
Inspect accessible refrigerant lines, joints, components, and coils for oil leaks.
Test for leaks as necessary.
Inspect and test contactors and relays.
Inspect refrigerant line insulation. Repair refrigerant line insulation where necessary.
Confirm the fan blade or blower wheel has a tight connection to the blower motor shaft. Inspect fan for free rotation and minimal endplay. Lubricate bearings as needed, only if recommended by OEM.
Inspect coil fins. Clean as required.
Evaporator Coil
Inspect cabinet, cabinet fasteners, and cabinet panels. Repair insulation to ensure proper operation. Replace lost fasteners as needed to ensure proper integrity and fit/finish of equipment (as applicable).
Inspect the required clearance (e.g.,service) around cabinet. Ensure no obstacles to airflow have been installed that would impede airflow. Report instances where the cabinet does not meet the requirements.
Condensate Removal
Inspect condensate drain piping (and traps) for proper operation. Clean as necessary.
Inspect for condensate blowing from coil into cabinet or air distribution system.
Inspect accessible drain pan and drain line for biological growth.
Inspect secondary drain lines, drain pans, and overflow protection devices, as applicable, for proper drain flow and evidence of water in secondary drain pan
Confirm correct airflow using delta-T and compare to OEM target. Adjust the system for proper airflow.
Measure dry bulb and TD across evaporator coil. If values are outside of appropriate OEM
ranges, check for correct airflow, refrigerant charge, and operating conditions.
Inspect accessible refrigerant lines, joints, components, and coils for oil leaks.
Test all oil stained joints for leaks.

And of course address any concerns you may have and make recommendations to improve comfort and efficiency!