E13 displayed and the unit indicates excessive regeneration frequency or salt usage.

Safety first: Programming changes do not require power removal, but avoid making changes during an active regeneration.

• Verify actual hardness: Use a reliable hardness test kit on raw water and compare to the value programmed into the Clearwater controller. Adjust if significantly higher than actual.
• Check capacity: Ensure the programmed capacity matches the Clearwater resin tank size (e.g., 32,000 grains for a 1.0 cu ft unit) and salt dose.
• Review meter factor: In installer settings, confirm the meter K-factor or pulses-per-gallon matches the installed Clearwater flow meter.
• Monitor usage: After adjustments, track regeneration frequency for a week. E13 should clear once usage aligns with expected values.

If the unit still regenerates excessively, the flow meter may be over-counting and should be inspected or replaced.