We have a Tiger River Spas Bengal (model M I believe) hot tub with a flashing red light on the control panel. In the past, we were able to get it running again by cleaning out the filter, draining the water, and refilling to eliminate any airlocks, etc. Nothing seems to work this time around. Looking at the motherboard, none of the LEDs are lit. Is this normal when the red light is flashing on the control panel? Or should at least some of the LEDs be lit whenever the unit has power? Is there anything we can do do flush out the system better?
Trying to determine the difference between there being a blockage somewhere vs a bad board.
