I have a older jandy aqualink controler that is giving me issues. Main board is located outside with a remote interior controler and a switch located in the spa. At random times it starts switching the filter pump from high speed to low speed rapidly. At times it will switch the valves (actuator) to spa mode and turn on auxiliary input on and off rapidly. This happens during a scheduled filter cycle and at random (middle of the night). Wondering if it is the main board, inside controler, or the spa switch?