I removed my Rigid SP-330D sump pump (w/diaphragm) to install a back-up battery pump. When I placed it back in the sump basin and plugged it in, it drained the basin but it won't shut off. The pump is only 1.5 years old and was working fine before I yanked it out of the sump pit. Any thoughts or advice for me?
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Sump pump will not shut off