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Error code reference

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

Gas Control V2

Bradford White codesBradford White water heater codes

Gas Control V2: Not an error; indicates pilot is lit and main burner is off.

First step from the service manual

Normal operation. The knob can be turned to a desired setpoint temperature.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 1 flash every 4 sec (green) means on a Bradford White water heater

The 1 flash every 4 seconds (green) status code on a Bradford White water heater with a Gas Control V2 valve is not an error condition. It is a normal operational status indicator confirming that the pilot flame is successfully lit and the main burner is currently off. The green LED on the gas control valve pulses at this cadence to communicate standby status, meaning the unit is functioning correctly and simply waiting for the thermostat to call for heat.

This status appears during the intervals between heating cycles, which is the majority of the water heater's operating time. When the water temperature in the tank drops below the setpoint, the gas control valve will open the main burner, and the LED flash pattern will change accordingly. When the burner satisfies the thermostat demand and shuts off, the unit returns to this 1-flash-every-4-seconds standby indication.

No diagnostic action or repair is needed when this code is displayed. The knob on the gas control valve can be turned to adjust the desired temperature setpoint at any time during this standby state. Technicians should only be concerned if this code is absent entirely, or if the pilot cannot be confirmed lit, which would suggest a separate ignition or thermocouple issue rather than anything related to this status code.

Source: manufacturer service documentation.

Common causes of 1 flash every 4 sec (green)

  1. 01

    Normal standby operation

    Wiring / connection

    The water temperature in the tank has reached the setpoint, so the main burner has shut off. The pilot remains lit and the unit is simply waiting for the next heating demand. This is the expected state for most of the water heater's daily operation.

  2. 02

    Recently completed a heating cycle

    Wiring / connection

    After the main burner fires and brings the tank up to the set temperature, the burner shuts off and the unit returns to this standby flash pattern. This transition is entirely normal and indicates the heating cycle completed successfully.

  3. 03

    Temperature setpoint is already satisfied

    Wiring / connection

    If the thermostat setpoint was recently lowered or the incoming water temperature is unusually warm, the tank may already be at or above the target temperature, keeping the unit in standby. Adjusting the setpoint knob to a higher temperature will prompt a heating cycle.

See the test procedure for each cause

Frequently asked questions about 1 flash every 4 sec (green)

What does 1 flash every 4 sec (green) mean on a Bradford White water_heater?
This flash pattern from the Gas Control V2 valve indicates normal standby operation. It confirms the pilot light is lit and the main burner is currently off because the tank water temperature has met the thermostat setpoint. No error has occurred and no repair is needed.
Do I need to fix anything when I see this green flash pattern?
No repair or intervention is required. This is a status indicator, not a fault code. If you want the unit to heat water, check that the temperature setpoint knob on the gas control valve is turned to your desired temperature. The burner will fire automatically when the tank temperature drops below that setting.
Is it safe to use the water heater when it shows 1 green flash every 4 seconds?
Yes, this condition is completely safe. The unit is in normal standby mode with the pilot lit and the main burner off. Hot water remains available in the tank, and the system will automatically fire the burner again when more hot water is needed.
How much does it cost to address this green flashing light on a Bradford White water heater?
There is no cost associated with this condition because it is not a fault. No parts or service call is necessary. If you are uncertain whether your unit is heating correctly despite this normal status code, a diagnostic service visit would typically run in the range of $75 to $150 depending on your location and technician.
Will resetting the gas control valve clear this flash pattern?
There is nothing to clear because this is not an error code. Resetting the gas control valve is unnecessary and would temporarily interrupt normal operation, including extinguishing the pilot. Simply leave the unit running and it will continue to cycle between this standby indication and active burner operation as needed.

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