Most problems with the ACE system are related to salt levels. It won’t work if the salt is too low or too high.
The Scepter Ace replacement cell is designed to work outside of the filter. Why? because it works better and does not violate Watkins patent. Use the provided plug to fill the hole on the filter cap. Pictures here:
For ACE equipped tubs software version 4 is for the Freshwater System and will likely cause problems with ACE operation. Make sure version 3 is loaded when using the ACE SYSTEM.
Yes, you can replace the cell on your Hot Spring ACE© system and save hundreds.