A SimpliSafe smoke and carbon monoxide detector that chirps, shows a low battery or goes offline needs attention straight away, because it is a life-safety device, and its power comes from a battery that has a defined life. A short chirp every minute or so is the common low-battery warning on smoke detectors, and the app shows a low battery alert for the device. Replace the battery with the type given in the detector's guide, and do it as soon as the alert appears.
The checks in more detail
Keep a spare on hand. After replacing the battery, press the test button to confirm that the detector sounds and that the app shows it as online. The detector also has an end-of-life: smoke and carbon monoxide detectors wear out, and the sensors do not stay reliable beyond the life that the maker states, often around ten years for smoke and a shorter time for carbon monoxide sensing.
The date of manufacture is printed on the unit. If the detector is past its life, replace the whole unit, not only the battery. A detector that chirps after a battery change may have a leftover charge, so hold the test button for a few seconds to clear it. Dust can also trigger false alarms and chirps; vacuum gently round the vents. If the detector goes offline in the app, check the distance to the base station and replace the battery, then restart the base station.
Do not ignore an offline detector. Test it monthly with the test button. If it sounds for real, leave the building and call emergency services; if the carbon monoxide alarm sounds, get everyone into fresh air, then call. Never disable a detector because of nuisance chirps. Contact SimpliSafe with the serial number if a new battery does not fix the chirp or if the unit is near its end of life.
Differential
Likely causes of “SimpliSafe Smoke & Carbon Monoxide Detector has power or battery problems”, and how to tell them apart
- 1
A low battery
What separates it A chirp and a low battery alert
How to confirm Replace the battery with the specified type
- 2
An unit past its life
What separates it Chirps persist after a new battery
How to confirm Replace the whole detector
- 3
Residual charge
What separates it A chirp after a battery change
How to confirm Hold the test button to clear it
- 4
Dust in the vents
What separates it False alarms or chirps
How to confirm Vacuum gently around the vents
- 5
A weak link
What separates it The detector shows offline
How to confirm Check range and restart the base station
Before you touch a setting
Record this first — changing settings destroys the evidence
- When the problem began and what changed
- Any message on the base station or in the app
- Whether other sensors work
- The device model and the system's serial number
Try in this order
0 of 6 completedReplace the battery
ReversibleAs soon as the alert appears.
Press the test button
ReversibleTo confirm it sounds.
Check the date on the unit
ReversibleReplace past its life.
Clean the vents
ReversibleGently.
Check the link
ReversibleTo the base station.
Contact SimpliSafe
ReversibleIf it keeps chirping.
Model-specific
What is true of this model and not of its siblings
- End of life
- Sensors wear out after years.
- Test button
- It checks the sounder.
Stop boundary
When this stops being a self-service repair
- !If the steps do not clear it, contact the maker with the model and the system details
- !Do not leave the alarm disarmed for long
- !Keep the app and the base station updated
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why does my SimpliSafe detector chirp?+
A low battery or the end of its life.
How often should I test it?+
Monthly.
What if the CO alarm sounds?+
Get everyone to fresh air and call.
Can I turn it off?+
No, replace the battery or the unit.