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Check that the bearings are fully seated, they should remain firmly seated in a socket down in the well and in the impeller cover and not come out without effort and a tool to pull them out. You need a dowel or pen or some blunt object to seat the bearing down in the well. Assuming the power bar is only for on and off switching and shows it is on, I would not presume any issue related to the controller. I really rarely see 1073.050 failures even very old, I would suspect this is something simple related to the drive unit jamming.
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Roger Vitko
Tunze USA
"He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!"
Current Tank Info: 210 gallon planted tank with Altum Angelfish
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