Viessmann Boilers Model 200 made from 2002 to 2002 are involved in a safety
recall.
http://www.cpsc.gov/cpscpub/prerel/prhtml09/09002.html

Name of Product: Vitodens 200 Boilers

Units: About 4,600

Manufacturer: Viessmann Manufacturing Co. Inc., of Canada

Hazard: The boiler can leak gas, posing a fire hazard to consumers.