On May 6, 2008, Weil-McLain recalled about 1,800 Williamson-Thermoflo GWS and GWI Gas Boilers and about 32,000 Weil-McLain CGs and CGi Gas Boilers because of a possibility for a carbon monoxide (CO) leak. If there is a leak in the gas boilers’ bent piping, a leak can occur, posing a carbon monoxide poisoning risk.

Included in the recall are cast iron, gas-fired boilers used for space heating. The following are model names and serial numbers included in the recall:

• Serial Numbers from CP 5160092 through CP 5663040 have model names GWS-127 and GWS-158
• Serial Numbers from CP 4363986 through CP 5699844 have model names GWI-063, GWI-095, GWI-127 and GWI-158
• Serial Numbers from CP 5071501 through CP 5694976 have model names CGs-3, CGs-4, CGs-5, and CGs-6
• Serial Numbers from CP 4134351 through CP 5698635 have model names CGi-3, CGi-5, and CGi-6 Series 2

Model names and serial numbers are located on separate labels on the outside of the left panel.

Plumbing and heating wholesale distributors sold the recalled Williamson-Thermoflo Gas Boilers to plumbers and contractors nationwide from October 2001 through December 2007 for between $1,500 and $2,700.

Consumers who have not already been contacted should contact their installer for a free safety inspection and repair, if necessary. For more information, customers may contact Williamson-Thermoflo at 866-783-9516, or visit the company’s website. Customers may also contact Weil-McLain at 866-783-9276, or at the company’s website.

Sources: “Williamson-Thermoflo Gas Boilers Recalled Due to Carbon Monoxide Hazard,” US Consumer Product Safety Commission Release #08-567, May 6, 2008; “Weil-McLain Gas Boilers Recalled Due to Carbon Monoxide Hazard,” US Consumer Product Safety Commission Release #08-566, May 6, 2008.