johnnycomet Posted December 19, 2017 Report Share Posted December 19, 2017 Ok, there are plenty of "blinking power light" threads on here but I'm trying to make sure I don't waste $ !! I've got a 2008 Tiger River Caspian and the hi limit keeps being triggered. I've replaced the circulation pump with a newer model along with hi limit and the thermistor. The circ pump flow seems fine- lots of bubbles. The filter is "reasonably" new. I disconnected the ozone a while back, but this problem showed up long after...When I reset the breakers, the tub gets reasonably hot but after a while it stops heating and the blinking power light starts; the DC17 LED on the IQ2020 board lights up. Both the heater and the connection IQ2020 LEDs light up when I reset the breakers. There doesn't seem to be any visible problems with the relay. Now, I've seen some white calcium buildup on the outside/bottom of the heater and high limit/thermistor recently. Is this the problem? I don't have scale in the main tub. I have never used Spa System Flush or similar but maybe I should have...! I have had a few rodent visitors in the area but it doesn't appear they have done any damage. Should I replace the heater? Would just flushing it work or is it too late? Any tips would be appreciated before I spend the dough. JC Quote Link to comment Share on other sites More sharing options...
johnnycomet Posted December 22, 2017 Author Report Share Posted December 22, 2017 Any ideas? It's been working fine the last few days but I keep waiting for this issue to rear its head again. BTW I also made sure to only add water into the stand pipe when refilling. JC Quote Link to comment Share on other sites More sharing options...
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