65,000 ppm Salt Reading!

Welcome to TFP.

Where did you get a reading of 65,000 ppm of salt?

Show us pictures of that reading.
 
Have you checked the cell is actually generating chlorine? It’s been my experience with the Hayward cells that once they are EOL they read way out (very high or low) and need to be replaced since they are not actually generating.
 
Check your flow switch using a multimeter and see that it is not stuck closed.

You can get strange salt readings when the system thinks water is flowing and tries to measure the salt level and it gets bad readings.