- Replace air filters (each visit);
- Tighten all wire connections (twice a year);
- Oil bearings as needed;
- Check belts and adjust tension (as needed);
- Check all safety protection (twice a year);
- Check General Proper functioning of the unit;
- Check thermostat operation (manual mode; twice a year);
- Check unit input voltage (actual voltage versus name plate voltage; twice a year);
- Check compressor input current (actual amp versus nameplate amp; once a year);
- Check fan motor input current (actual amp versus nameplate amp; once a year);
- Check blower input current (actual amp versus nameplate amp; twice a year);
- Check drain line (once a year or as needed);
- Check refrigerant (as needed);
- Check differential temperature (once or twice a year depending on system);
- Flush condenser coil with water (once a year or as needed);
- Light cooling coil cleaning (once a year or as needed);
- Check burner (once a year if applicable);
- Check flue pipe (once a year if applicable;
