Completed routine AC maintenance service in Baytown today. Customer's Carrier system was due for seasonal check-up. Performed comprehensive inspection including cleaning condenser coils which had significant pollen and debris buildup. Checked refrigerant pressure - levels were within normal range. Replaced air filter with customer-provided MERV 11 filter. Cleaned condensate drain line with compressed air and added treatment tablets to prevent future algae growth. Tested thermostat calibration which was accurate within 1 degree. Inspected electrical connections and tightened several loose terminals at the condenser unit. Measured supply/return temperature differential at 18°F, indicating good system performance. All components functioning properly with no signs of imminent issues. Recommended scheduling fall heating system check before winter. Customer appreciated thorough service and system is now operating at peak efficiency for summer heat.