Applicable if your keypad is this 4 button style and you have Light, Temperature Up/Down, Pump, and Aux buttons.
Press Temp, then Pump, then press Temp to adjust from F2 to FC, press Pump once desired cycle is selected to program it. Any changes take 24 hours to go into effect. The first preset cycle begins 6 minutes after the hot tub is energized. The second preset cycle begins 12 hours later. The digit after the F is the length of hours and FC stands for Filter Continuous.

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