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I purchased 2 Osmolator 3155 ATOs in April and am having what I believe to be optical sensor issues with both. Anyone able to help?
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They’re both brand new and not dirty. Low water indicator kicks on the pump and would go until the float valve hits the high water alarm. I took the optical sensor out of the mount and submerged it a few inches to test what happens and the pump still runs. Happened to both units. They were working fine, I turned the power off during a water change and when I flipped the power back on, neither of them worked correctly.