I was wondering what happens to a hot tub's settings, ( purge cycle, filtration, temp. setting etc. clock, if it has one ) if there is a power interruption while you are away on vacation or away for a weekend? When power returns after a power interruption does someone manually have to do something to a tub to get it going again, or will it continue its normal operational cycles automatically when the power does return? If everything has to be reset inorder for the tub to work, how do you handle that situation? If you are away, you won't know if there was a power interruption and would not be there to reset anything. What if this occurs during freezing temperatures? Wouldn't the tub freeze up while you are away if no one resets any settings?