Customer stated that electric water heater will fluctuate in water temperature and that sewer ejection pump wasn’t working properly. Ran diagnostics on electric water heater and tested both thermostats and elements. At this time thermostats and both elements were working as they should. Did find that both thermostats were set to different temperatures so adjusted it. Pull through injection pump to inspect and found that pump burnt out. Furnished installed new pump with new check valve and ball valve. Tested and pump is working as it should with no leaks present at this time. Cleaned up work area.