Bradford White Water Heater Error Code 16

Error code 16 is an over-temperature warning indicating the control system detected excessively high water or heat exchanger temperature. The heater shuts down as a protective measure to prevent component damage and scalding risk. The fault will need to be diagnosed and the root cause corrected before the unit resumes normal operation.

No, you should not attempt to continue normal use while code 16 is active. The error indicates the heater detected dangerously high temperatures, and operating with that condition present risks damaging internal components, connections, and in extreme cases could pose a scalding hazard. The unit should remain out of service until the cause is identified and corrected.

Repair costs vary widely depending on the cause. If the fix involves clearing a blocked vent terminal or adjusting system flow, costs may be limited to a service call fee, typically in the range of $75 to $150. If a temperature sensor needs replacement, parts and labor could range from $150 to $350. A control board replacement represents a higher-cost repair, often falling between $300 and $600 or more depending on the model and labor rates in your area.

Start by checking for any blockages in the airflow around the unit and at the vent terminal, since restricted combustion air or exhaust is the most common trigger. Next, assess whether the hot water circulation system is operating with adequate flow, as a low-flow loop can cause short cycling and temperature spikes. Finally, inspect the combustion chamber and exhaust path for foreign material or debris. If all physical checks pass, a faulty temperature sensor or control component may need professional testing and replacement.

A reset may clear the fault temporarily and allow the heater to restart, but if the underlying cause is not addressed, the code will return. Short cycling, blocked venting, or debris in the combustion chamber will continue to drive temperatures above safe limits with each firing cycle. Always resolve the root cause before relying on a reset as a solution.