Display shows E10 and the unit indicates a sensor calibration or configuration error.

Safety: No plumbing work is required for this step, but unplug the unit before opening the control cover.

Steps to address E10 (Configuration / Calibration Fault):

• 1. Verify model settings: Check the installer menu and confirm that tank size, resin volume, and meter type match your specific SpringWell softener model.
• 2. Perform factory reset: Follow the SpringWell manual to perform a factory reset of the controller. Re-enter all required parameters (time, hardness, capacity, regeneration time).
• 3. Update firmware (if supported): If SpringWell provides firmware updates for your control head, follow their instructions to update the firmware to the latest version.
• 4. Inspect internal sensors: Some control heads include internal position or pressure sensors. If E10 persists after reprogramming and reset, the internal sensor or board is likely defective.
• 5. Replace control head: Replace the SpringWell electronic control head if configuration errors cannot be cleared.