Check Filter Cycles

Check the Length of your Filter Cycles.
Shortening the Filter Cycles and Filtering during Cooler Hours of the Day may Reduce Spa Water Overheating.  It may be best to Filter at Night and in the Early Morning Only.
Consistent Ambient Temperatures Above the Set Temperature may Contribute to Spa Water Overheating.  It may help to Shade the Spa if it is Exposed to the Sun on Very Hot Days.

Problem May have been Corrected - End Test

Additional Help Is Needed