New to the forum but have been researching the issues with the PCB of the Aqua Trol for a month or so now without any luck. I have done all of the troubleshooting as detailed in the manual but seem to be stumped when it comes to pin 2 and 4 of the display board. I get readings way off from the norm. 22vdc on pin 4. Pin 2 I get nothing. Thermistor looks to be fine. Did a resistance test on it and numbers seems to be good. TP13 I get 5v. R17 I get 24v and 19v on right side. TP14 I get around 3 vdc which seems a little off as this should be 5vdc from what I have researched. Any help or suggestions would be greatly appreciated!