Maintenance and service must be performed by a qualified installer or service agency. At the beginning of each cooling season, the system should be checked as follows:
At the beginning of each cooling season, the system should be checked as follows:
NOTE ‐ If insufficient cooling occurs, the unit should be gauged and refrigerant charge should be checked.
Cleaning of the outdoor unit's coil should be performed by a trained service technician. Contact your dealer and set up a schedule (preferably twice a year, but at least once a year) to inspect and service your outdoor unit. The following maintenance may be performed by the homeowner.
It may be necessary to flush the outdoor coil more frequently if it is exposed to substances which are corrosive or which block airflow across the coil (e.g., pet urine, cottonwood seeds, fertilizers, fluids that may contain high levels of corrosive chemicals such as salts)
The outdoor unit must be properly maintained to ensure its proper operation.
Source: MaintainX (Community Member)