Are the T-cells interchangeable on a Hayward AquaRite system? For example, can I replace a T-cell 9 with a T-cell 15, or vice versa?
There are normally two concerns we hear from pool owners when we receive this question: they want to know if replumbing is required and if a different T-cell is compatible with their control box.
Since the cells are of the same length, no replumbing is required. The new cell will connect to the existing unions. No problem.
As far as compatibility, there are some limitations for older AquaRite systems. T-cell 15 will work with all revisions of the AquaRite. However, the T-cell 3, 5, and 9 will only work with revisions 1.5 and higher. You can check their revision by pushing the diagnostic button seven times.
If you decide to change the T-cell, make sure you change the cell type that’s displayed in the control box. Otherwise, the system will receive incorrect salt readings, and it won’t produce chlorine.
To change the cell type in the control box, set the main toggle switch to “auto”. Then press the diagnostic button until the “T” number appears. Slide the toggle switch to “super chlorinate”, and then back to “auto”. The cell type will change. Repeat this process until the cell type in the display matches the new cell type.
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