CO detectors can be set off by dust bunnies so a small amount of computer duster might help. Also, some are combo CO and LP gas detectors. Could it be a little propane?
Last, some have battery backup, might check the battery if it has one and your smoke alarm.
NOTE TO ALL new RV owners. The fire/smoke detectors probably don't have a battery in them from the factory!
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2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
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