Tech arrived to one time maintenance visit. System is approximately 2 years old and located in attic. Home is under renovation. Customer expresses no issues. System is a communication system. No relevant error codes found. Customer changed out AprilAire filter recently. Tested system in heat. Temp rise in low and high heat was within specs. Flushed drain line. System has 3 water protection safeties. Two float switches in the pan and 1 in line float switch. Verified safety operations. Checked cooling. According to communication thermostat, pressures are within specs, outdoor of 45 at testing. Outdoor coil is slightly dirty. System is fully operational. Verified drain line is draining. Thank you for letting TE Certified service your home.