Troubleshoot electrical issue. ISSUE: ac unit causing intermittent buzzing at panel LOCATION: main floor/ downstairs ac unit FINDINGS: the buzzing would occur approximately every 45 seconds to a minute. Upon inspecting the unit, it would cut off for a split second and turn back on. I tested voltage at the panel and got proper readings. I tested voltage at the disconnect and the ac unit and got proper readings. I bypassed the disconnect to see if it was the cause of the shutting off, but unit still would turn off then back on. Upon inspecting the connections inside the ac unit, I noticed a wire on the capacitor charred and disconnected. RESOLUTION: I left estimates to replace disconnects and whips due to age and romex being ran in the whip. The issue of shutting off and coming back on is related to the capacitor so the customer scheduled hvac service to repair.