Tech arrived at a tune-up. 2yo zoned. Upon inspection, the capacitor was within specs. The contactor was in working condition. The condenser coils were hosed off to assist with air flow across the coils. The refrigerant was a little low and the Schrader core was leaking on the high side line. The filter was dirty. The drain was clear and bleach was poured. There was evidence of past water in the secondary pan. The customer was informed of recommendations today. He will pass on repairs today and was informed that the system may continue to lose refrigerant until the core is replaced. Customer mentioned something about a Walmart gift card. Tech was unaware of this situation. The system was functioning upon departure.