Last summer, the cover was broken and so I ran the tub at around 99degrees with only a tarp to cover the tub. After a few weeks, the tub would stop heating and flash "OH". I'd shut off the tub at the knife-switch, flip it back on, and it would heat up just fine for a few days. After a week or so of this, I researched online, I replaced the temp sensor (part #BAL 30352 generic 96 temp sensorw/ 3 8 bulb for value & LE systems). After getting that replaced, I fill the tub and go to flip the knife-switch out at the deck, and the display shows a "0" for a few seconds, and then shows a "Sn" code.
Should I have replaced the hi-temp sensor instead/too? Please help!!!