Instruct: Classify Amazon reviews into positive or negative sentiment
Query: OK at first but then...

I first installed my Basepump in Spring 2010. It worked ok for several months, then during the winter it seemed to be not working.I checked outlet for freezing but seemed like no blockages in effluent pipe or inside the pump. I waited for Spring thaw to see a if any difference, no changes.After exhausting my troubleshooting options and verifying proper feed water flow, I contacted the company to return for repair or replacement.They tested it and said it was fine. I tried it again without success.So it is sitting here without resolution to whatever problem exists.I know it can work and did for some months, but just don't know what happened to it, so can't say I am happy.