CPSC issues recall of U.S. Boiler's home heating boilers

U.S. Boiler is recalling more than 20,000 home heating boilers.

The Consumer Products Safety Commission says the air pressure switch can fail to shut down the burners when there's a blockage in the vent system.   The CPSC adds that could cause excessive amounts of carbon monoxide.

The recall covers three models of cast iron hot water boilers that use natural gas or liquid petroleum to heat water for residential space heating.