The smoke alarm gives a brief beep every 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. Replace the battery immediately.

The carbon monoxide detector gives one audible chirp every minute, and can continue doing so for up to 30 days.

Possible cause: Incorrect settings of sensor/circuitry or low batteries. Check the detector's settings, or fit new batteries - this chirping doesn't mean carbon monoxide has actually been detected.

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Auto-Trail • Smoke & CO Alarms

Covers: Tracker, Apache

Tracker models: RS, EKS, FB, LB, RB, EB

Apache models: 632, 634, 700

Auto-Trail Smoke & CO Alarms

(Tracker / Apache, 2019 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
`N/A`	The smoke alarm gives a brief beep every minute.	The battery is worn out and needs replacing.	Replace the battery immediately. (Low voltage warning sounds for approximately seven days).	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 →
`N/A`	The smoke alarm's LED doesn't blink once a minute as it normally would.	Battery is completely flat	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 →
`N/A`	The carbon monoxide detector gives one audible chirp every minute, and can continue doing so for up to 30 days.	Incorrect settings of sensor/circuitry or low batteries	Check the detector's settings, or fit new batteries - this chirping 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 →

Frequently Asked Questions

Q: How often should I test and maintain the carbon monoxide detector?

Weekly, press and hold the test/reset button for about a second - this checks the sounder, battery and circuitry together. Wipe or gently vacuum away any dust buildup, and change the battery roughly once a year even if it hasn't complained yet. The sensor itself is only rated for seven years from when it was first activated, after which the whole unit needs swapping for a new one, not just the battery.