Pool and Spa
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My name is*****'ll be happy to assist with your spa.
When it reaches the set temperature, have you checked the flow switch to see if is sticking in the closed position? When the circ. pump is not moving water through the heater, (because the set temp. is reached), the Flow Switch must open.
Please let me know what you find. Thank you.
On your model spa, there are two flo codes: One is "FLO2, and the other one is "FLO". Please double check and let me know for certain which message you are seeing, since they are different faults. This is important for me to know for certain in order to properly help you.
If you can confirm that the circ. pump is running and moving water through the heater and returning back to the spa, you will need to confirm that the flow switch is staying closed. You can do this by checking the flow switch with an ohm meter to determine if there is continuity through the switch. Just because the circ pump does not turn off is not a guaranty that the flow switch is staying closed.