Performed scheduled maintenance on 1 split system. Flushed and cleared drain pan and drain line with drain cleaner and water. Installed algae drain treatment that was not installed during installation. Did not change filter per customer request. Uv light was functioning and will be due for replacement during next maintenance visit. Cleaned evaporator and condenser coils. Customer stated that system has been struggling to satisfy temperature setting on thermostat, I reduced fan speed from medium high down to medium to help with this issue. System functioning upon departure. Thank you for using AirNow for all of your air conditioning needs!