Spring Residential Air Conditioning Repair in Garland. Upon arrival found the system not cooling. Checked the inside unit and found everything operational. Checked the outdoor unit and the unit hummed and then came on second try. Checked the inside cabinet and found that the wire connection going from contactor to capacitor had burnt up & will need to replace the wire. Fixed the lead on the compressor and install a new contactor and 45mfd capacitor and add 2lbs of 410-a to get the system properly cooling.