Checked thermostat. Checked filter. Changed easy flex filter supplied by customer. Flushed out AC trap. Checked temperature drop. 20° temp drop. Checked all electrical connections. Checked contactor. Checked capacitor. Cleaned outdoor coil with hose and water. Cycled system to check. System is operating properly at this time. Thanks Brian. Customer would like to have a Solenoid that was found to be faulty in the heating tuneup. Causing a buzzing and vibrating noise. He would like to have that repair done during the heating tuneup.