[C320-list] Shower sump pump woes

[Scott Thompson]

At the end of a cruise yesterday someone who shall remain nameless turned on the shower sump pump to drain melt water in the fridge but forgot to turn it off so it ran for quite a while. ( We couldn’t hear it over engine noise. ) Later I noticed more water in the fridge from defrosting and tried the pump again. Nothing pumped out. I correctly thought the filter might be clogged and so we removed it and cleaned it. But the pump won’t prime at all now. Thoughts?  Do I need a new pump?  Any priming tricks welcome.

 And what kind of contortionist installed that thing in the first place. I can look at it through the door under the sink, or I can sort of get my hands in there, but not both at once.