This years start up was hectic, still is, I went through all the connections because I had something shorting out the gfi. Finally came the conclusion it was the aqua trol unit. When I plug the unit to the pump it shorts out the gfi. Is this a typical problem? unit is only two years old. Can I open up the unit to see if there is any problems with in, or is this technician only type stuff. I am quite familiar with electrical issues. As always thanks for listening. I have plugged the pump to an outside power source running through the same feed and pump works fine.