Bradford White Water Heater Error Code 11

Error code 11 means the water heater attempted to ignite the burner but failed to confirm that a flame was established within the trial ignition period. The control board shuts down the unit and logs this code to prevent unburned gas from building up. The issue can stem from gas supply problems, air in the lines, or a failed ignition component such as the igniter, flame sensor, or gas valve.

The unit is designed to shut down safely when ignition fails, so there is no immediate danger from the code itself. However, you should not attempt to bypass the safety lockout or manually force ignition. If you smell gas at or near the unit, leave the area, avoid operating electrical switches, and contact your gas utility before doing anything else.

Repair costs vary depending on the cause. If the fix is simply bleeding air from gas lines or opening a shutoff valve, there may be no parts cost involved, only a service call fee which can range from around $75 to $150 or more. If a component like the igniter, flame sensor, or gas valve needs replacement, parts and labor combined can range from approximately $150 to $450 depending on the specific part and local labor rates.

Start by confirming your gas supply is on, the shutoff valve is fully open, and the gas type matches the unit's rating. If gas line work was recently done, bleed any air from the lines and retry. If the gas supply checks out, inspect the igniter and flame sensor for damage, fouling, or corrosion. A failed component will need to be cleaned or replaced to restore normal ignition.

A reset may allow the unit to attempt another ignition cycle, but if the underlying cause is still present, the code will return. Resetting without diagnosing and correcting the root issue, such as low gas pressure, air in the lines, or a faulty igniter, will not produce a lasting fix. Address the cause first, then reset the unit to confirm normal operation.