Utilitech AC condensate pump not pumping

Hi. I have a Utilitech condensate pump that all of a sudden decided to not pump out the water that collects in the plastic bin underneath. The water overflowed and I'm assuming it's why my downstairs neighbor has water damage on her ceiling. How can I fix this? The white float inside seems to be working because the "run" and "alarm" lights are both coming on when the water reaches a higher level, but I don't see or hear it running and water just sits in the bin. I'm having to manually empty it to run my AC. Any suggestions would be helpful. The image of the pump I have is below. Thanks!

https://images.duckduckgo.com/iu/?u=...003010.jpg&f=1