• Check indoor coil
  • Check air filters
  • Clean air filters
  • Check airflow across the indoor coil
  • Check outdoor coil
  • Clean outdoor coil
  • Check airflow across the outdoor coil
  • Check temperature drop across indoor coil
  • Check voltage and amperage to all motors
  • Check electrical wiring and connections
  • Check compressor contactor
  • Check that condensate drain is open
  • Check operating pressures
  • Check for possible leaks of refrigerant
  • Check condition of copper tubing insulation
  • Check outdoor unit’s wall brackets and bolts
  • Change batteries of remote control
  • Check overall appearance of the system