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Bosch Recalls Boilers Due to Carbon Monoxide Poisoning Hazard

The siphon can become blocked, which can create a carbon monoxide hazard.


On December 20, 2019, Bosch Thermotechnology issued a recall for Buderus GB125-35 oil-condensing boilers.  

According to the recall, the siphon can become blocked, which leads to a delayed ignition that can damage the boiler’s exhaust system and create a carbon monoxide hazard. 

The recall impacts about 170 units. Consumers should immediately contact Bosch for a free repair.   

No injuries have been reported in the United States.  

The units were manufactured by Bosch Thermotechnik GmbH of Germany and were installed from June 2008 to September 2012.  

The boilers have a blue enclosure, and the GB125-35 model number is located on the data plate near the top right hand side of the boiler (see image).   

Boiler 2CPSC

The Buderus brand name is printed on the outside of the boiler’s blue enclosure.  

Bosch Thermotechnology and the model number are printed on a white label on the blue enclosure. 

Consumers who continue to use the boilers while awaiting repair should have a working carbon monoxide alarm installed outside of sleeping areas in the home.

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