Hearth Record

Williamson-Thermoflo Gas Boilers Recalled Due to Carbon Monoxide Hazard

Home product recall 08-567. Announced by CPSC on May 6, 2008.

CPSC’s own notice, on cpsc.gov

Watch and the shortlist are kept with a free account, on every device. Your watch list. CPSC’s own notice is on cpsc.gov.

The short answer

Announced by CPSC on May 6, 2008. Copied from CPSC on Oct 19, 2026.

Every line below is in CPSC’s own words, with its source beside it.

What’s wrong with it?

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.

Source:

CPSC, Recalls API. Checked Oct 19, 2026. Updated daily.

What should you do?

Consumers who have not already been contacted, should contact their installer for a free safety inspection and repair, if necessary.

Source:

CPSC, Recalls API. Checked Oct 19, 2026. Updated daily.

  • How to reach the firm: For more information, contact Williamson-Thermoflo toll-free at (866) 783-9516 between 8 a.m. and 4 p.m. CT Monday through Friday, or visit the firm’s Web site at www.williamson-thermoflo.com

Which ones are recalled?

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.

About 1,800 units, as CPSC gives them.

Williamson-Thermoflo GWS and GWI Gas Boilers.

Source:

CPSC, Recalls API. Checked Oct 19, 2026. Updated daily.

CPSC’s photos

CPSC shows 1 photo on its notice. Hearth Record doesn’t copy them; each opens on cpsc.gov.

Who made and sold it?

  • Made by Weil-McLain, Michigan City, Ind.
  • Plumbing and heating wholesale distributors to plumbers and contractors nationwide from October 2001 through December 2007 for between $1,500 and $2,700.
  • Made in United States, as the notice gives it.
Source:

CPSC, Recalls API. Checked Oct 19, 2026. Updated daily.

Was anyone hurt?

None reported.

Source:

CPSC, Recalls API. Checked Oct 19, 2026. Updated daily.

What the record doesn’t say

  • The notice lists no UPCs, so check the model, the description and the photos.
  • The notice lists no model numbers in a field of their own; its description may give them.
  • How many have been returned or fixed isn’t in the notice.
Source:

Hearth Record wrote these lines.

Sources

  • U.S. Consumer Product Safety Commission, Recalls API.

    Checked Oct 19, 2026. Updated daily. Public domain (U.S. Government work). CPSC asks to be credited, and that no endorsement be implied.

Source:

Recalls of kids’ and home products are from the U.S. Consumer Product Safety Commission (CPSC). CPSC does not endorse Hearth Record. Copied on Oct 19, 2026.

How to read a record

Four things every record does, shown on an example record made up for this guide.

An example record, made up for this guide

An example nursing home

Made up for this guide: no real place is shown

Not fully inspected in over two years (CMS flag)

11 health citations at the latest inspection cycle

The state average is 14.3.

Source:

CMS, State and US Averages and Health Deficiencies. Released Oct 8, 2026. Updated monthly.

From the homeNone yet. Replies and paid listings aren’t open, and when they open they will sit here, below the record.

1 of 4

Every fact names its source.

Who published it, when, and how often it changes sit beside each fact, with a link to the agency’s own file.

Sign in

A free account keeps your watch list, shortlists, comparisons and saved searches on every device, and can email you when something you watch changes. Browsing never needs one.