Bradford White Water Heater Error Code 1 flash every 4 sec green (V2)

The 1 flash every 4 seconds green indicator on a Bradford White water heater (V2 control system) is a normal status signal, not an error or fault condition. This pattern is produced by the thermopile-based gas valve control, which continuously monitors system status and communicates it through the LED indicator. A slow, steady green flash at this interval confirms that the pilot flame is actively burning and that the main burner is currently off because the water temperature has reached the set point.

This signal originates from the gas valve's integrated control board, which reads thermopile output voltage to confirm pilot presence. When the pilot is lit and generating sufficient millivoltage, the control acknowledges this with the repeating green flash pattern. The main burner remains off until the stored water cools below the set point threshold, at which point the control opens the main gas valve to fire the burner and recover water temperature.

If this indicator is observed and the water heater is not delivering hot water at the expected temperature, the most likely explanation is that the temperature knob on the gas valve is set too low for the application. Rotating the knob to a higher temperature setting, typically marked between the Warm and Hot positions, will lower the cutoff threshold and cause the burner to cycle on more frequently. No service action is required when this indicator is displaying normally.