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Randy OwensJul 31, 2025
What to do if Kidde KN-COSM-B-RF Carbon Monoxide Alarm signals an alarm when no fire is present?
- WWendy CookJul 31, 2025
If your Kidde Carbon Monoxide Alarm is sounding an alarm and there's no fire, it could be due to several reasons. First, the unit might be set to the same ID pattern as a nearby system; in this case, change the ID pattern of your units by removing batteries from all units before changing the switch positions. Another possibility is that the unit is located in an area prone to false alarms, so relocate the unit. Wireless interference could also be the cause, so try moving the other units to a new location.