Bradford White Water Heater Error Code 10

Error code 10 on a Bradford White water heater signals that the unit has detected a blockage or restriction in the air supply or exhaust venting system. The heater shuts down as a safety precaution to prevent incomplete combustion and the potential buildup of carbon monoxide. You will need to locate and clear the obstruction before the heater will resume normal operation.

The error code itself represents the heater working correctly as a safety system. The underlying cause, a blocked exhaust, is potentially serious because a restricted flue can allow carbon monoxide to enter the home if the unit were to operate. Do not attempt to bypass the lockout. Address the blockage before returning the unit to service, and consider testing your carbon monoxide detectors any time a venting fault occurs.

If the cause is a simple external blockage you can clear yourself, there may be no parts cost at all. Replacing a damaged vent pipe section typically runs in the range of $20 to $100 in materials depending on pipe diameter and length. If the inducer motor or pressure switch has failed and needs replacement, labor and parts combined can range from $150 to $400 or more depending on your location and the specific components required.

Start by inspecting the exterior intake and exhaust termination caps for visible blockages such as nests, ice, or debris and clear anything you find. Next, check that all vent pipe sections inside the home are properly connected and free of kinks or damage. Confirm the installation space has adequate airflow for combustion. Once the obstruction is resolved, reset the control board and monitor the unit to see if the code returns.

A reset will clear the lockout and allow the burner to attempt ignition, but it will not resolve the underlying cause. If the vent obstruction is still present, the unit will detect the restricted airflow again and return to fault within a short time. Clear the blockage first, then perform the reset so the heater can resume normal operation without immediately faulting again.