The only way I can get my aqua trol to turn off is by unplugging it. Timer no longer causes it to switch on/off at the set times, but even flipping the switch down in the "OFF" position doesn't do it. Also having a lot of trouble keeping chlorine levels up and with water getting cloudy, so I suspect it is not generating chlorine. It's about 7 years old. Call to the company was not helpful... they sent a link to the guide (which I already can find on my own) but trouble shooting guide doesn't address this problem anyway. Do I need to replace it or can I fix this? If I can fix it... how?! THANKS!!!!