Tunze Osmolator replacement pump

[DriftN201]

My pump for my Tunze Osomolator Nano turns on for 1 second and shuts down. I have tried adjusting the sensor and making sure the pump is submerged and everything is connected. I am searching for a replacement pump but everyone is sold out. Has anyone every used a different nano pump for this ATO. I don't really want to but a new ATO or the Tunze plug adapter.

 

[blaxsun]

Is it out of warranty?