I have a Hawkeye spa that whenever the power even flickers (which happens a lot around my house) resets the temp to 100. Is there any way to install a small battery that will maintain the temp... I like to keep the spa at 85 to 90 during the summer and everytime I go out there it has reset to 100...Any suggestions.

On a lot of spa circuit board there is a battery, look on the board for it, it they sometimes are like a watch battery. That should help, why not call the Electric Company?