U.S. Boiler Recalls

Hazard: The blocked vent switch (BVS) can fail to shut down the burners if the boilers are installed at altitudes above 5,400 feet and the vent system becomes blocked. In such an event, the boiler can emit excessive amounts of carbon monoxide into the home, posing a carbon monoxide (CO) poisoning hazard to consumers.

Hazard: The air pressure switch can fail to shut down the burners when there is a blockage in the vent system, allowing the boiler to emit excessive amounts of carbon monoxide and posing a CO poisoning hazard to the consumer.