Check the wires carefully for any breaks.
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The AquaPure does not have a flow switch, it has a flow sensor, which is a heated probe and and unheated probe and it works on the same principle as "wind chill".
The sensor works by heating a little metal button exposed inside the cell. The more water flow, the more heat is drawn away from the button, and the more current to the heater. The electronics in the box sense this current.
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Causes of NO FLOW can be:
- Actual low flow. VSP set too low? Make sure skimmers, pump basket, are filter is clean and nothing else clogged.
- Crust (like calcium) over the button. Water can't carry the heat away. Check by removing the sensor and looking for it. Clean gently as needed.
- Failing heater element. Can't draw expected current. Replace sensor.
- Sensor wiring problem. Check connections inside the box.
- Bad electronics in the box. Least likely, but if the flow and sensor are good, this is all that's left.
If you have a No-Flow error try resetting the circuit breaker and re-calibrating the tri-sensor before you consider replacing it.
You can find instructions for replacing and calibrating the tri-sensor in the
AquaPure and PureLink Tri-Sensor Adapter Installation Kit Manual.
