Water2Buy softener emits a constant humming noise even when not regenerating

Safety first: Unplug the power adapter to see if the noise stops.

• Isolate source: Place your hand lightly on the power adapter and valve head to feel where the vibration originates.
• Check motor: If the noise comes from the valve head, remove the cover and see if the motor is warm or attempting to move. Replace the motor if it is stalled.
• Replace adapter: If the noise is from the adapter and is excessive, replace it with a genuine Water2Buy adapter.
• Controller check: If the motor is constantly powered, the control board may be faulty and require replacement.