Remove the spa cover if it is currently on the spa. Wait for the water temperature to cool down to 104 degrees Fahrenheit or lower. Attempting to reset the sensor will not work if the water temperature is still above 104 degrees.
Hold down the button labeled "PROG" for five seconds. The high limit indicator will disappear and the system will reset.
Adjust the spa settings as needed. Replace the cover on the spa if desired.
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