Customer was able to pay $800 at the end of the job. Customer says to charge the Visa on file for the remaining $264.20 tonight. Pausing job to ensure remaining balance is collected. Arrived to a blocked drain. Water in the emergency pan and dripping through the ceiling. A lot of algae build up in the primary drain pan. Cleared drain, added drain pan treatment and installed a germicidal light to help kill the growth. Performed function check. System running and cooling upon departure.