Williamson-Thermoflo Gas Boilers – Carbon Monoxide Risk (2008)
Hazard assessment based on recall description.
This AI-generated summary is provided for general informational purposes only and is derived from publicly available recall notices. It supplements but does not replace official agency classifications or safety instructions.
Check Your Product
According to the U.S. Consumer Product Safety Commission (CPSC)
Product
Williamson-Thermoflo GWS and GWI Gas Boilers
Brand
Weil-McLain, of Michigan City, Ind.
Lot Codes / Batch Numbers
Not specified in CPSC notice. Check official source for details.
Product Images
Source: U.S. Consumer Product Safety Commission
Weil-McLain, of Michigan City, Ind. is recalling Williamson-Thermoflo GWS and GWI Gas Boilers. The hazard is: If there is a leak in the vent piping, the recalled boilers can leak carbon monoxide (CO) into the b. Based on CPSC recall notice.
Summary derived from CPSC notice
The following details were not provided by CPSC: UPC codes.
Reason for Recall
As stated by CPSC
The recall involves cast iron, gas-fired boilers used for space heating. The following model names and serial numbers are included in the recall: Model Name Serial Numbers GWS-127, GWS-158 From CP 5160092 through CP 5663040 GWI-063, GWI-095, GWI-127, GWI-158 From CP 4363986 through CP 5699844 The model name and serial number are located on separate labels on the outside of the left panel.
Reported concern (CPSC)
If there is a leak in the vent piping, the recalled boilers can leak carbon monoxide (CO) into the buildings in which they are installed, posing a risk of CO poisoning.
Recommended Action
Per CPSC guidance
Consumers who have not already been contacted, should contact their installer for a free safety inspection and repair, if necessary.
Verify this information on the official source
For complete details and official instructions, check the U.S. Consumer Product Safety Commission (CPSC) directly.
View official CPSC recall noticePage updated: Jan 6, 2026