I have a Koolance 450S with 24v controller I have been using for the last year and a half. Tonight I was installing my loop in my new build,I opened the pump to clean it and replaced the o-ring(with a bits power D5 o-ring replacement), and everything was going good. I started to fill the res and turned the pump on. Water is moving and when the res got low I turned it off to fill it back up, but when I started it up again it started making noise. When I took it apart it looks like the impellers metal part is rubbing on the pumps metal drum.There's a grove I can see and feel a little on the pumps drum and there's a spot on the impellers metal part that looks "polished" that lines up with the grove. What happened, and is there a way to fix it?
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