I am in the same situation as hottubrepair above: very cold climate. My tub is set at 104, but when it is 0 degrees F outside, I open my tub, it reads 103, but within a minute it drops to 102 then 101. My old tub usually was at 106 to 107 in the winter and felt great.
Is there some way to sign a release, forget the warrentee, and get some one to increase my tub to 107?