E05 displayed and unit does not meter water usage (no gallons counted)

Safety first: Unplug the unit and place the bypass in BYPASS. Depressurize by opening a faucet.

• Access flow meter: On most Waterguy softeners, the flow meter is integrated into the outlet side of the control valve. Remove the outlet union and locate the turbine or paddle wheel assembly.
• Clean turbine: Carefully remove the turbine. Rinse under water and use a soft brush to remove iron, sand, or scale. Ensure it spins freely with a light puff of air.
• Inspect sensor: Check the small sensor module that reads the turbine (Hall sensor). Ensure it is fully seated and the wiring harness is intact and plugged into the control board.
• Reassemble and test: Reinstall the turbine and outlet union, restore water and power, and run water at a faucet. Watch the display to confirm that flow is being registered.

If E05 persists and no flow is detected despite a free-spinning turbine, replace the Waterguy flow meter sensor or the entire meter housing.