2006 Watchdog error - - - - 4 dashes

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Old 04-19-20, 08:38 AM
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2006 Watchdog error - - - - 4 dashes

So with my 2006 Hot Spot. I am getting the watchdog 4 dashes error. I have replaced: The High Limit Thermistor, The control Thermister, The flow valve sensor, and the upper control unit...Am I down to it for sure being the control box systemboard? Is it possible the heater is gunked up with the PH Scale? Our water is very high in PH....I did do a system flush with system flush chemical.The hot tub will heat up. Work correctly, seemingly for 6 to 10 hours...but after awhile it kick in the watchdog error. I'm not 100% sure if it is indeed overheating or not.

At this point...should I take off my heater and take a look at it? Or would I be wasting my time and it is for sure the control board?
Is there any way to test the control board for this issue?
Thanks in advance
 
 

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