This is the second sensor that has been replaced. The first I had the hot tub vendor replace through their service department. So this is the first one that I replaced. I knew the symptoms were the same as previous and with the price from spadepot I could afford to replace it and if it didn’t fix the problem then oh well. But it did fix the problem and it saved me over $250. I also looked at you tube video which was not specifically for my tub but it just allowed for a more comfortable replacement.