Submersible Punp Trips GFCI

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Old 09-09-11, 07:23 PM
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Submersible Punp Trips GFCI

I have a fountain pump that worked fine for several years. Then, it begin tripping the GFCI. Sometimes it trips immediately, and sometimes runs several seconds. I have tried it on several GFCI's.

My question is - do I have even a ghost of a chance of finding the problem and repairing it? I like to tinker with things, and have a lot of time. If the answer is no, I will probably tear it apart just to see what is in there.
 
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Old 09-09-11, 08:05 PM
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I think it would cost more to repair than to replace the pump. It is probably leakage through the motor windings.
 
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Old 09-09-11, 08:06 PM
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Repair if possible would probably consist of removing the the stator, meggering it out, baking for a day or two if the megger reading was bad then rechecking. If you could get a good reading after baking you would need to dip the stator in varnish and bake again or use an exothermic two part epoxy to seal the winding. Then you need to clean the inside of the stator of all varnish or epoxy using a fine abrasive rubber grinding wheel.

Of course that's if you can get the case open. On a cheap submersible the case may be welded or glued together.

Bottom line not repairable. Just buy a new one.
 
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Old 09-10-11, 10:38 AM
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I already bought a new one. I just want to do it to see if I can.

So, everyone agrees that the problem is likely in the motor rather than the cord? Is separating the two the only way to determine that?

The case does seem to be welded or glued together. Any way to get it apart?
 
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Old 09-10-11, 10:46 AM
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The case does seem to be welded or glued together. Any way to get it apart?
Yes. Putting it back together is the problem.
 
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Old 09-12-11, 11:01 AM
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The most common failure on these is water leaking in through the shaft seal between the pump and the motor or the entry point of the cord through the rubber grommet.
 
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