I have a new vibration in the wall between the living room and garage. Sounds like an electrical motor. I located the circut in the panel, it's the circut that carries the kitchen and living room lights and wall plugs. Sound disappears when breaker turned off. Just started yesterday, no new appliances or fixtures installed. Ther is a ceiling fan in the living room with a speed control for the fan. However the fan is turned off and there is still humming. The fan control has a remote control. Is the power always on for the remote? Could this cause the hum?