Upon arrival to scheduled system maintenance I was shown to an A/H unit located horizontally in the garage. Immediately pulled off panel doors to inspect all electrical components connections, collect electrical readings and check the evaporator coil for cleanliness. Evaporator coil is clean but very rusted. Pictures uploaded to ST. All electrical components connections are secure and all readings are fully within range of factory specifications. Collected temperature differential at the air handler and had a 20° split temperature in the cooling mode. This system is equipped with 2 different types of UV light systems that are both needing replacements at this time. Spoke to the homeowner about the benefits of replacing the bulbs and he agreed and moved forward with quoted work. Went outside to the C/air to verify the systems refrigerant charge, inspect all electrical components connections, collect amp draw/voltage readings off the equipment. Clear the condensate drain line and