Octopus Skimmer Impeller stopping

[JRod]

I have a modded out DNW-200 that has been moded for about 6 months now. Never had a problem before, but now my pump is constantly shutting down on me.

The impeller seems to stop spinning inside. I take it out, cleaned it, rubbed it with some steel wool if any bumps and plugged in. About 6 hours runs and stops spinning so I unplug.

Have gone through this 4 times already.

Anyone having this problem, any ideas.

Increased flow in thinking could be overheating or may have to remod again.

Thanks.

[bertoni]

Have you tried cleaning the pump with some vinegar? I suspect that the pump casing has expanded, but there might be calcium buildup. I just put the pump in a small container and add vinegar and water, then run the pump for a while.