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Puzzled with another FLO error problem on sundance optima

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Nessuno:
Interesting. With the Flow Switch shorted, and you still get the "FLO" error, I would suspect the logic board. That can lead to a potential meltdown with the heater also (if you're tub is still similar to my 2001 Sundance Cameo), if no water is pumping through the heater core and it is trying to heat (Experience speaking here, I accidentally had a meltdown that turned my plastic heater housing into a goey mess.). 

You probably have a thermostat which is reading wrong. There is also a high-limit temperature sensor but that is a fail safe device I do believe. 34degrees Celsius is 93.2 Fahrenheit. could your board be set to Celsius?

Nessuno:
Follow Up for anyone researching circulation pumps. My Laing pump is still working. No problems.

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