On my third ozonator. Four pin connector type that plugs into the box. Replacing the microchip does not fix it. Works great when I plug in a new one, check it again in a few months- not working. Spa is 220 but power for ozonator is 110. Correct Ozonator installed for 110 V. Suspect power surges or dirty power? Anybody sell a surge protector for a spa, or do I have to wire in my own? I suspected power surge as my spa clock will never stay set at the right time for more than a few days/ weeks. Any ideas?