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If the FLO indicator is solid and not flashing between FLO and the temperature, and there is no water flowing through the flow switch, then 99% likely you have a bad flow switch.
: We have a 2004 Sundance Optima. The FLO indicator has come on and won't
: shut off. Since it came on, we have cleaned the filter and run the
: tub without the filter to get any air out. Neither of those worked,
: so we removed the right panel. There are three hoses connected to
: switch - the one that goes off to the right is very short and is
: connected to a white plastic tube that is about 5 inches long.
: This plastic tube has a small hose coming out of that is connected to a
: blue box with 'SunZone' CD on it. This small hose is in two pieces,
: and is connected by a small white plastic piece. This small white
: piece has broken; it has a black disc in it and appears to have the
: letters 'VAC' on it. As a temporary fix, we have taped it back
: together but we still get the FLO message. Could this small piece be
: causing our problem, and if so, how do we find out what part it is?
: Also, should the flow switch be 100% filled with water? In other words,
: should there be air bubbles in the switch?
: Greatly appreciate your assistance. Best, Melissa
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