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SN2 fault after refilling jacuzzi hot tub


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The SN2 error code indicates that the hi-temperature sensor in the heater or the water temperature sensor is malfunctioning.

Start by removing the filters. Take them out of the equation. If there is a flow restriction the hi temp sensor might pick that up and send error. Make sure there is sufficient water flow from the circ pump and that there are no air locks in it. Look at your flow switch and you will see if the water if flowing through it correctly.

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