Bradford White Water Heater Error Code 29

Code 29 means the pressure switch failed to close during startup or was detected in the stuck-open position during operation. The pressure switch monitors draft in the venting system and must close before ignition is allowed to proceed. The control board locks out and displays this code when it cannot confirm proper airflow. Common triggers include a blocked vent terminal, a clogged condensate drain, or a faulty switch.

The water heater has shut itself down as a safety measure, so there is no active combustion hazard while the lockout is in effect. However, you should not attempt to bypass the pressure switch or repeatedly force restarts without identifying the root cause. The pressure switch exists to prevent combustion from occurring when venting conditions are unsafe. Restore normal vent and drain conditions before returning the unit to service.

If the fix involves clearing a vent obstruction or thawing a frozen condensate line, the cost can be minimal. A pressure switch replacement typically ranges from around $50 to $150 for the part, plus labor if a technician is needed. An inducer motor replacement is more involved and can range from $200 to $500 or more depending on the model and local labor rates. Getting a diagnosis first is the best way to estimate the actual repair cost for your specific situation.

Start by inspecting the exhaust vent terminal outdoors for ice, debris, or any obstruction blocking airflow. Next, check the condensate trap and drain line for clogs, and if you are in a cold climate, verify the drain has not frozen. If the venting and drainage are clear, inspect the rubber tubing connected to the pressure switch for cracks or loose fittings. If none of those steps resolve the fault, a technician should test the pressure switch and the inducer motor.

A manual reset may temporarily clear the lockout, but the code will return if the underlying condition has not been corrected. The pressure switch must successfully close during the next startup sequence or the control board will lock out again. Persistent code 29 faults after resetting indicate that a physical restriction, a failed switch, damaged tubing, or a weak inducer motor needs to be addressed before the unit will run reliably.