[ShrimpBurrito]

Interesting. If the polarity on the pump is reversed, then the pump is just running in reverse. I don't know the water flow design, but if the pump is an impeller design, I suppose it's possible it could still pump water -- but I'm not sure why that would create the problem you describe.

But switching the wires is not difficult. Remove the 2 phillips screws closest to the top cover behind the seat to uncover the wires.

At the most, it would involve cutting, stripping, and wire-nutting 2 wires together. 5 minute job. If you don't have wire strippers, go get a pair (no more than $10) -- you'll need them again for another project. And if the pump has blade fittings, it would take about 10 seconds to change, no extra tools required.

Dave