Recently, I noticed that my pool pump was not turning off at the preprogrammed time. After opening the control panel by the equipment, I noticed that that the button selecting between Auto, Service and Timeout modes, was not functioning. The lights were toggling between the modes, but the pump was not turning off. The only way to stop the pump from running was to flip the circuit breaker at the panel. Is there a relay switch that could have gone out? The indoor control panel seems to be working fine, coming on and off at the preprogrammed times. I did notice a thin yellow wire not connected but couldn't locate where it goes. Enclosed are a few pictures.