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

The 1 flash every 4 seconds green status indicator on a Bradford White water heater is not an error code. It is a normal operational status signal from the electronic gas valve control system. This pattern indicates that the pilot flame is successfully lit and confirmed, the gas valve is powered and functioning, and the main burner is currently off because the thermostat is satisfied or the setpoint knob has not yet been configured to a water temperature setting. The control system is in a standby-ready state.

The gas valve receives input from the thermostat circuit and the setpoint knob. When the water in the tank reaches the selected temperature, the thermostat opens the circuit to the main burner valve, cutting off gas flow to the burner while keeping the pilot lit. The control board continues to flash green at this slow interval to confirm system health. If the setpoint knob is left in an unconfigured or off-adjacent position after installation or after a reset, the gas valve will also hold in this standby state and produce the same 1-flash pattern.

This status requires no repair or service action. The appropriate response is to verify the setpoint knob is turned to the desired water temperature setting. Once the knob is set and the tank water temperature falls below the setpoint, the thermostat will close the circuit, the gas valve will open, and the main burner will ignite. The indicator pattern will then change to reflect active heating or continued satisfied-thermostat standby as the tank cycles normally.