Report "Thermostat kicks in Air Handler but Compressor does not go on. Happens periodically. Have had service come out two times but could not find a problem. Condensor okay, Kick start okay. I have tried a "band aid" by turning off the unit and then restarting it and the compressor goes on or: If that doesn't work I go outside and bang where the controls are located and that seems to work sometimes. Can anyone explain what the problem may be? A real conundrum!!! S.Pontillo"