Bradford White Water Heater Error Code 63

Error code 63 means the water heater attempted to ignite the burner the maximum number of times allowed and failed each time, triggering a lockout. The control shuts down to prevent unburned gas from accumulating. This code points to a problem in the combustion system, which includes the igniter, flame sensor, gas valve, burner, and venting. A full combustion system inspection is required to identify and resolve the root cause.

The lockout triggered by code 63 is a safety feature designed to prevent unburned gas from continuing to flow when ignition cannot be confirmed. The heater stops trying to light until the issue is resolved, which reduces the risk of gas accumulation. If you smell gas at any point during troubleshooting, leave the area immediately and contact your gas utility. Do not attempt repairs in the presence of a gas odor.

Repair costs vary depending on which component has failed. Flame sensor replacement is typically on the lower end of the cost range, often between $50 and $150 including parts and labor. Igniter or gas valve replacement can run between $150 and $400 or more depending on the model and labor rates in your area. A full diagnostic service call alone may cost between $75 and $150 before any parts are factored in.

Resetting the unit may clear the lockout temporarily and allow the heater to attempt ignition again, but if the underlying problem is not corrected, the unit will cycle through retries and return to code 63. A reset is useful for confirming whether the fault is intermittent, but it is not a fix on its own. Persistent code 63 after a reset requires hands-on diagnosis of the combustion system components.

Start by inspecting the combustion system components as directed in Bradford White technical procedures. Check the flame sensor for contamination and clean or replace it if needed. Verify gas supply pressure and that the shutoff valve is fully open. Inspect the igniter for damage and confirm the venting system is clear of obstructions. If these checks do not resolve the fault, the gas valve or control board may require further testing.