Viessmann U.S. Recalls Boilers Due to Fire Hazard.Hazard: The boiler can leak gas, posing a fire hazard to consumers. Incidents/Injuries: None reported. Description: The recall involves the Vitodens 200 boiler. The gas-fired boilers are white, wall-mounted and have “Viessmann” and “Vitodens 200” printed on the exterior in silver letters. The model and serial numbers included in the recall are listed below. The model number is located on the silver rating plate on the side of the boiler. Contact your certified HVAC contractor to open the boiler and locate the serial number on a white label on the side of the boiler, or under the bottom support panel. Vitodens 100 boilers are not included in this recall. Model Number Serial Number Additional Information WB2 6-24C 7167063xxxxxxxxx or 7170317xxxxxxxxx If the serial number’s 8th digit (listed in red) is a 2, 3, 4, 5 or 6, the boiler is included in the recall. WB2 6-24 7167064xxxxxxxxx or 7170318xxxxxxxxx WB2 8-32 7167065xxxxxxxxx or 7170319xxxxxxxxx WB2 11-44 7167066xxxxxxxxx or 7188578xxxxxxxxx WB2 15-60 7167067xxxxxxxxx or 7188577xxxxxxxxx