Bradford White Water Heater Error Code 0

Error code 0 on a Bradford White water heater means the gas control valve is receiving no electrical power and the control LED is completely off. This is not a sensor fault or component error but rather a total loss of power to the control circuit. The diagnostic process starts by confirming the unit is switched on and that the supply circuit is active.

Error code 0 itself is not an active safety hazard because it indicates the control has no power and the burner will not fire. However, if the unit has no hot water due to this fault, it should be resolved promptly. Do not attempt to bypass the control power circuit or operate the unit outside of its designed electrical parameters.

If the fix involves only resetting a breaker or flipping the control power switch, there is no parts cost involved. If a transformer needs replacement, parts and labor typically run in the range of $100 to $250 depending on the technician and region. A full gas control valve replacement, if that proves necessary, generally falls in the range of $200 to $500 or more including labor.

Start by confirming the control power switch on the unit is in the ON position. Then check your home's electrical panel for a tripped breaker associated with the water heater circuit and reset it if needed. If power is restored and the LED activates, the unit should resume normal operation. If line voltage is present at the unit but the control LED remains off, inspect the wiring harness and consider having the gas control valve or transformer evaluated by a technician.

A simple reset will not resolve error code 0 if the underlying power supply issue has not been corrected first. Unlike fault codes triggered by sensor readings or ignition failures, this code reflects a fundamental absence of electrical power. Once the power supply is restored and confirmed, the control should power up automatically without needing a separate reset procedure.