Performed preventative maintenance for a Trane AC system. Model: 4TTR4030L1000BA. Serial number: 22033U2B3F Removed panels. Inspected evaporator coil for any dust build up. Checked blower motor and wheel for any dust and dirt build up. Poured water down the drain line to make sure it drained properly. Changed Merv 11 20x20x4 Chud supplied. Placed panels back on and turned the unit on at the thermostat and watched it run. Inspected the outdoor condenser coils for dirt. Removed panel and checked the electrical connections. Took amp draw for the compressor, 5.76 amps. Took amp draw for the fan, .73 amps. Temperature split of 21°. Turned unit off at the thermostat. System is operating properly at this time. No charge for maintenance FWI, charged for filter only.