-Performed first visit CMA Full Service on one wall mounted Gas Package System and one Split Furnace System. -Left System (Rheem Gas Pack): Signs of freezing at compressor upon arrival. Found evaporator coil completely encased in ice. Condenser coil excessively dirty. Air filter excessively dirty, likely causing severe restriction in air flow. Unable to obtain accurate supply temperature or oppressor amperage until evaporator coil has completely defrosted. -Right System (Trane Split Furnace): Recommend EZ Trap to properly service drain line. Provided estimate for installation of trap $153.90. Added 2 unions to clear drain line with compressed nitrogen. System operating correctly at this time.