Error Chirps once each minute, continuing for as long as 30 days: Carbon monoxide detector sounding single chirp

Possible cause: Incorrect settings found by sensor/circuitry or low batteries. Fit new batteries in the detector - this chirp doesn't mean carbon monoxide has actually been detected.

Error Short beep once a minute: Smoke alarm emitting short beep once a minute

Possible cause: The battery is worn out and needs replacing.. Replace the battery immediately (low voltage warning sounds for approximately seven days).

The smoke alarm's LED doesn't blink once a minute as it normally would.

Possible cause: Battery is completely flat or missing. Replace the battery immediately.

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Auto-Trail • Adventure • Smoke & CO Alarms

Auto-Trail Smoke & CO Alarms

(Adventure, 2026 Model Year)

View official manual on manufacturer's site ↗

Master Troubleshooting & Diagnostics Matrix

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`Chirps once each minute, continuing for as long as 30 days`	Carbon monoxide detector sounding single chirp	Incorrect settings found by sensor/circuitry or low batteries	Fit new batteries in the detector - this chirp doesn't mean carbon monoxide has actually been detected.	DIY Safe
Recommended partsAffiliate linksView 2 optionsHide Check which battery type your CO alarm takes (look at the batteries fitted now), then choose the matching pack: The handbook doesn't say which battery this alarm uses. Most caravan CO alarms take AA or 9V batteries, so check yours before ordering. AA batteriesDuracell Plus AA Alkaline Batteries (12 Pack) 1.5V, LR06~£9.00 for 124.7★ (71,000+ ratings), dispatched/sold by Amazon View on Amazon → 9V batteryDuracell Plus 9V Alkaline Batteries (2 Pack) 6LR61~£6.50 for 24.7★ (15,000+ ratings), dispatched/sold by Amazon View on Amazon →
`Short beep once a minute`	Smoke alarm emitting short beep once a minute	The battery is worn out and needs replacing.	Replace the battery immediately (low voltage warning sounds for approximately seven days).	DIY Safe
`N/A`	The smoke alarm's LED doesn't blink once a minute as it normally would.	Battery is completely flat or missing	Replace the battery immediately.	DIY Safe
Recommended partsAffiliate linksView 2 optionsHide Check which battery your smoke alarm takes (look at the battery fitted now), then choose the matching one: The handbook says the smoke alarm is battery-operated but doesn't name the battery type, so check yours before ordering. 9V batteryDuracell Plus 9V Alkaline Batteries (2 Pack) 6LR61~£6.50 for 24.7★ (15,000+ ratings), dispatched/sold by Amazon View on Amazon → AA batteriesDuracell Plus AA Alkaline Batteries (12 Pack) 1.5V, LR06~£9.00 for 124.7★ (71,000+ ratings), dispatched/sold by Amazon View on Amazon →