Rick D

Hi, I have a Downeast Spa with a Balboa MS510S controller installed. It is a 3 Pump system, pump 1 is working on low speed, pumps 2 and 3 are fine. When pump 1 is running at low speed, the LED next to the pump 1 button is lit. If I press the pump 1 button to go to high speed, nothing happens. The LED stays lit, the pump does not go into high speed, no clicking in the control box as when turning other pumps on. Any ideas? Thanks, Rick