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Before emptying the hot tub and refilling for the winter months everything was operating fine on the hot tub. After refilling when powering the tub back up, the red power light / LED started flashing after coming on solid for roughly 5-8 seconds before flashing. Below are various observations and items tried to diagnose why the IQ 2020 control box is going into a mode of flashing the red power light. * Hot tub was purchased three years ago not being operational and needed a replacement heater power relay board to get running then. * Filter removed from circulation pump inlet to rule out a clogged filter * Water released from drain valve to expel some air present as an air lock was initial suspected issue * Upon turning on power, red light turns on solid for roughly 5-8 seconds before going to flashing. * Circulation pump does not turn on until the red light starts flashing (no flow during initial 5-8 seconds) * Water flowing up from water feature when turned on and flow seen from heater return (flow of heater return not yet checked) * 220V GFCI breakers to the spa reset multiple times (off for over 30 seconds each time) before turning back on. * Power cycled with turning on only the control breaker and NOT the heater breaker shows the same flashing red light after 5-8 seconds * Rear auxiliary panel and LED modules both disconnected with flashing red light still being present upon power up * Ran circulation pump for 8-10 minutes with heater breaker off, then checked thermistor values. hi-limit was 16.33 kOhms, Control was 16.93 kOhms. I have read that these two values should not differ by > 0.2 kOhms and they did differ by 0.6 kOhms. * Current heater is not a Watkins heater, but is a ThermProducts 26-C3160-1S heater (with limit switch wire) that must have been installed by previous owner. * Circulation pump appears to be original. * Next step today is to remove the drain cover to place in plumbing to allow for measuring flow rate to confirm being greater than 3 gallons/minute In doing extensive internet searches, I cannot find any information as to what the power up sequence is for the IQ2020 controller to identify what should be coming on in what order and what items would trigger the flashing red power light. I suspect that my issue is between the circulation pump, the heater and the thermistors on the heater, but would like to absolutely confirm which needs replacement instead of all of them. I would appreciate any feedback on what to do next for further diagnostics to determine the failed part to replace it with it now getting just below freezing overnight. Thanks for any help you may be able to provide. redzr1

I have Tiger River hot tub- I am guessing it is an 02 or 03 model. The tub powers up then after a couple of hours the red Power light starts blinking and it stops heating. I reset the breakers and it works for a while and then the same thing happens. The more often that I do this the shorter the duration between the resetting of the breakers and the “Blinking of the Power light”. Maybe because the water is getting warmer in the tub? The tub never gets to the set temperature (maybe 10 degrees shy of it). I tested the thermistors- they were still good I have replaced both thermistors – same results I force purged the tub with a garden hose through the gray standpipe- same results I replaced the circ pump (The new one is considerably stronger) – same results I double checked that I didn’t have an air leek or air bubbles in the circ pump. The tub has a stereo- I have removed it and the its ac/dc convertor. I have removed the filters and tested it – same results If anyone has any advice on the next steps to diagnose this problem it would be greatly appreciated.

Hi everyone. So I finally bought my first spa. My wife and I are so excited. It is a 2006 Dream Maker Spa, x400.120 volt. So, we hooked it up last saturday, and everything is going very well. Starting last night, after my wife pressed the light button once or twice, (could have just been a coincidence timing wise) the spa started acting weirdly. A small clicking noise started to come from the engine area. The light would be on it's fade program, but flashing intermittently with the speed of the clicking. Also the display would go back to its default 100 degree setting (the default temp after plugging it in) and when you try to push the temp. up or down via buttons, it would flash "56" then go back to allowing me to attempt to change temperature. Last night when it first started, we tried a few power cycles by unplugging spa, and plugging in, to success. Then when we got back in tonight, it started again after 15 min or so. Things that might affect, that I have just found out. (we just moved into this home, so still learning the power situation) The breaker it is on is a 15 amp breaker, (hot tub takes 12 amps) that also, (at least, but could be more) controls the lights to 2 of the four bedrooms. (problem happens with lights on or off currently) I AM using a high gauge 25 foot. (i only needed it to be about 3-6 feet, but couldn't find a shorter one) extension chord. Doesn't seem like that could be the issue but worth throwing out there. The control panel could use some new clear silicone around the edge of the control panel, and the buttons aren't perfect from when it was brand new (just seems to have a little bit of wear, although all the buttons still work fine none the less) So....is there anyone who has any idea as to what this may be? Sorry for all the info, just know people smarter than I sometimes need all this information. Any advice really helps. Thank you in advance. -John