Tunze Osmulator Pump Issue

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InsaneClownFish

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Old style Osmulator pump fails to turn on.

System starts with all lights to green then to yellow for the 10-15sec prime but the pump doesn’t activate. There is a low, almost inaudible hum.

Troubleshooting I’ve tried-
-moving the water level sensor
-cleaning the sensor
-cleaning the connection leads
-re-seating the leads
-unplugging and trying after hours or next day
-turning the pump upside down to remove air
-turning the propeller manually to make sure it isn’t locked

I’m pretty sure the pump is shorted. I was just about to order the high jet as a replacement, but I figured I’d post here to make sure I’m not missing something.

The unit worked flawlessly. I broke it down for a few months and when I plugged it all back in nada.
 

rvitko

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Yes, I would say this is definitely a dead pump.
 

Looking back to your reefing roots: Did you start with Instant Ocean salt?

  • I started with Instant Ocean salt.

    Votes: 172 72.9%
  • I did not start with Instant Ocean salt, but I have used it at some point.

    Votes: 17 7.2%
  • I did not start with Instant Ocean salt and have not used it.

    Votes: 42 17.8%
  • Other.

    Votes: 5 2.1%
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