Upon arrival I checked sewer pump and found that the alarm light was on pulled pump and found that floats are fine placed pump back in and waited for AC to turn off so I could hear and turned power back on to pump and only would hum pump is under warranty and will be replaced at no charge Return today 5/10/23 Upon arrival I removed sewer pump and installed new 1/2hp pump after installing placed hose in basin testing serval time and everything is working properly with no issues