I recently moved into a house with a 5 year old outdoor Sweetwater Bahia spa. I've used it twice in the last month without a problem, but I noticed yesterday that the temperature reading now blinks the first digit, second digit, an then the third digit and continues blinking only one display digit at a time. I believe it's showing the correct temperature (it was 102 yesterday and I changed it to 100, today it is still blinking but reads 100). I'm able to switch the cleaning cycle but the display continued blinking (alternating between F and 2 for instance). Any idea what I should do to fix the issue?