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

A green LED flashing once per second on a Bradford White water heater with the Gas Control V2 means the main gas valve is open and the burner is actively lit. This is a normal operational status, not an error. The control will automatically shut the burner off once the water reaches the setpoint temperature.

Yes, it is completely safe to use hot water while the green light is flashing. The flash indicates the burner is on and heating the water, which is the intended normal operation of the unit. There is no hazard associated with this status indicator.

Resetting the control is not necessary and will not change the underlying operation. The green flash will stop on its own once the water temperature reaches the setpoint and the control closes the main valve. Performing an unnecessary reset during a normal heating cycle will simply interrupt the current heating operation.

No action is required when the green light flashes once per second. This simply means the heater is in the middle of a heating cycle. If the flashing stops after a period of time and the water is hot, everything is working correctly. Only investigate further if the burner appears to run continuously without ever shutting off.

No repair cost applies to a single green flash per second because this is not an error condition. If further investigation reveals a related component issue such as a faulty Gas Control V2 assembly, repair costs can range widely depending on parts and labor in your area.