We have a new to us (2006) Balboa tub with a Balboa Topside Panel, Lite Digital, 54116 display. This is a basic display with two buttons, lights/jets and temp. Digital heat disply in between. I have no idea how this display operates. I can not find any kind of manual anywhere re: how this control panel works. It seems that there is no setting that allows the tub to heat without the jets/motor running. The motor automatically varies from high to low speed as it's heating. I have been in/seen other tubs that heat without the motor audibly running so I'm hoping our tub can do this, especially for $ reasons. Is this possible? Any input about this particular control panel or the ways to use the tub most efficiently would be greatly appreciated. I live in AL, it will only be below freezing (lower 20s/upper 10s) at night for, maybe, two months. Approx. 2.5 more months of low 40s/high 30s at night if that makes a difference in keeping the tub warm. Thanks!!