Yesterday I visually inspected the paddle wheel and noticed that it was spinning freely and constant. As the signal was intermittent replaced the coil at the back of the wheel only. This does not require access to the high active water. With the coil replaced the signal looked strong. I asked operations to keep and eye on it and advise if the problem has been resolved. I also discussed with David this morning and he informed me that this is the same procedure he would have followed.