when I came into shop this morning both carbon monoxide alarms were going off in camper. The camper is pluged in and gas is turned off. any ideas what could set off?
Some CO alarms are also propane alarms. Propane alarms are also set off by methane, and . . . wait for it . . . dog farts (or sewer gas). Our dog occasionally sleeps on the floor next to such an alarm, and will fart in her sleep, setting off said alarm.