(WHDH) — Viessmann is recalling thousands of boilers because the heat exchanger back plate can corrode and leak flue gases, allowing the boiler to emit excessive amounts of carbon monoxide, according to the U.S. Consumer Product Safety Commission.
The recall involves 2,900 Vitodens 200-W and Vitodens 222-F series boilers used for space or domestic water heating. There are five affected models in a specific serial number range.
The Vitodens 200-W is a wall hung unit, housed in a white metal box about 38 inches high and 18 inches wide. The Vitodens 222-F is a floor mounted unit, housed in a white metal box about 68 inches tall and 24 inches wide.
The name “Vitodens” is printed on the label on the outside of the boiler box. The product name and model number can be found on the left side of the boiler cover. The serial number can be found on the underside of the wall mounted boiler and on the center section on the floor mount model.
The impacted models are as follows:
| Product | Model | Part Number | Serial Number Range |
| Vitodens 200-W | B2HB 19 | 7538092 | 7538092401003107 to 7538092701038106 |
| B2HB 26 | 7538093 | 7538093401002107 to 7538093701177109 | |
| B2HB 35 | 7538094 | 7538094401003101 to 7538094701446103 | |
| Vitodens 222-F | B2TB 19 | 7542250 | 7542250401001100 to 7542250401210106 |
| B2TB 35 | 7542251 | 7542251401001107 to 7542251701257105 |
Consumers with recalled boilers should immediately contact the installer or distributor from whom they purchased the boiler or Viessmann to schedule a free in-home safety inspection and repair.
The boilers were sold at authorized dealers from Sept. 2014 through Oct. 2018.
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