Analog Controller Panel Layout POOL TEMPERATURE CONTROL - Set this knob for desired pool water temperature POOL/OFF/SPA -Toggles between pool temperature/off/spa temperature SPA TEMPERATURE CONTROL - Set this knob for desired spa water temperature POWER LIGHT - Indicates electrical power is supplied to the heat pump FLOW LIGHT - Indicates water pressure (Flow) is present at the heat pump >> Get an overview of these controls l Troubleshooting Guide