Hi, I have a Sundance Montego spa and I'm having 2 types of errors. 1, sometimes the display will somewhat just lock up. The lights on the display will switch back and forth from standard to economy and none of the controls will work, and none of the jets are working at that time, also you can hear a clicking on off sound every 30 seconds or so, and the tempature is displaying. Second, when the spa gets close to the set tempature, a FLO error comes on and the display locks up again so I cant change anything. Filter is new and pumps and jets work fine while tub is heating to temp. Also the vertical heater was cracked on the top of canister so I had it tig welded and it seems to be heating fine, Im wondering if I need to replace a flo sensor/temp sensor, or might this be a control problem or heater prob. Any help would be greatly appreciated, Thanks. Sometimes when I turn the spa on I can use the spa fine for a while untill I get the flo error, it also has an ozinator too how do I know if that is bad or not.