CPSC campaign 09008
Hazard
The automatic gas vent damper could fail, and if the blocked vent switch does not activate, the vent could leak carbon monoxide (CO). This poses a risk of CO poisoning to consumers.
Remedy
Consumers should immediately stop using the boilers, weather permitting, and contact their installer to confirm they have a recalled vent damper and to receive a free vent damper replacement.
The text above is quoted verbatim from the CPSC record. Confirm the affected units and the remedy with the manufacturer or CPSC. Recall data may be incomplete, delayed, or superseded.