Safety first: Do not open the power adapter; replace it if faulty.

Check outlet: Test the outlet with another device. Reset any tripped breakers or GFCIs.
Inspect adapter: Ensure the Waterguy transformer is firmly plugged in and the cord is not damaged.
Check low-voltage plug: Confirm the low-voltage connector is fully seated in the control head.
Board replacement: If there is still no display with a known-good adapter, the main control board is likely failed and must be replaced.

Softener will not start at all; display is blank and unit appears dead

Possible Causes