Performed single system cooling maintenance. I checked amps, capacitor, filter, drains, cleanliness, electrical, refrigerant temperature, and temperature differential. System is cooling to manufacture specifications. During the maintenance, I noticed a couple things that could be addressed. This issues are not a major issues now, but they will become an issue. The suction line pipe insulation is exposed due to critters chewing on it. This reduces efficiency and will cause water to drip on the attic floor during operation. The drain has some build up and this could lead to clogging. The evaporator coil has half of the evaporator coil oxidized. This leads to poor temperature transfer and poor efficiency. I provided pricing to address concerns.