JeanniG Posted December 27, 2020 Report Share Posted December 27, 2020 We have a 2009 Tiger River Spa Caspian model. About 2 years ago we replaced all the boards and button controls. It has been working great since. Tried to use it last night and found the whole system didn't have any power. Checked house breaker (still ok) and both breakers at the unit. When both breakers are on there is indication that the board is trying to power up when the pwr on indicator lights up. Then the D21 sensor shows red and it seems that something is trying to start up but nothing happens. This happens multiple times to no joy. I need to figure out what this sensor (D21) is linked to. Both main breakers are off again and I could really use some help before I call the repair people. Thanks Andrea Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted December 28, 2020 Report Share Posted December 28, 2020 What is the d21 sensor? Post a pic of your circuit board. Quote Link to comment Share on other sites More sharing options...
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