What to do if my Pentair Control Unit shows Regen Failure?
- AAlyssa BatesAug 20, 2025
If your Pentair Control Unit displays a Regen Failure error, it means the system hasn't regenerated for an extended period. You can perform a manual regeneration to clear the error code. If it's a metered system, check if it's measuring flow by running water and observing the flow indicator. If no flow is measured, verify the meter cable connection and meter functionality. In Master Programming Mode, ensure the unit is configured correctly, including system capacity, day override, and meter identification. If it's a Day-of-Week system, confirm at least one day is set to ON. Adjust the settings as needed.













