Pool and Spa
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this is a watchdog lockout where the tub got too hot or "thought" it got too hot.
Turn off for 10 min and remove filter...reset back on. Tell us if code changes
can you determine yet if the tub is just cooling down or keeping heat?
what is current SET point
what is current ACTUAL temperature of water
Is the circulation pump running
And is there a FL...OH...or any othe code appearing at this time?