[Richard L]

The sensor has to be quite close to the body. With the clip on, the sensor will remain the permitted gap even the tip is slightly retracted into the sensor body. So it still points to a faulty sensor.

If the sensor cable was plugged into the wrong slot in the controller, it can damage it. Or if the red harness is plugged into the sensor slot, it can damage the circuitry. So get the cable and go from there. Once the system left the factory, one can never predict what people do with it. Every case is different and long drawn out. Have been doing this for years.

Cannot guarantee ii will fix it. If you have a friend with an aquamist system. You can test the cable.