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ADT Smoke and Carbon Monoxide Detector troubleshooting

ADT Smoke and Carbon Monoxide Detector (SSSX5R0): battery (from ADT Help); sensing; where the date is; testing; placement; silencing and clearing, and a fix for each symptom below.

Battery (from ADT Help)
Three CR123A batteries in the combined smoke and CO detector (SSSX5R0-29).
Sensing
The CO side uses electrochemical sensing, so it can catch elevated levels earlier.

SetupOfflineWi-FiNotificationsRoutineVoice control

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1 exact answers

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ADT · factory reset

ADT Smoke and Carbon Monoxide Detector will not reset or needs to be reset safely

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Which units this covers, and how to tell yours is one of them

Model numbers and patterns: SSSX5R0
Not applicable to this hardware: This ADT Smoke and Carbon Monoxide Detector does not have the hardware for: will not stay connected to Wi-Fi; does not respond to voice control; video is blurry, dark, frozen or delayed; misses motion or records too many events; shared users or family members cannot control it; will not connect through Matter, HomeKit or another platform; firmware update is stuck or failed.

Published specification

What is true of this model and changes how you fix it

What it is
A dual-function detector (model SSSX5R0) that monitors for both smoke and carbon monoxide from one device, operating continuously regardless of the system's arm state.
Distinct model
ADT sells this as its own model number, separate from the standalone Smoke Detector (SSS5R0) and standalone Carbon Monoxide Detector (SSCO5R0) — it is not a firmware or settings variant of either single-purpose detector.
Power
Three CR123A batteries, included — the same count as the standalone Smoke Detector, one more than the standalone CO Detector.
Where the date is
An ADT smoke and carbon monoxide detector has a manufacture date printed on its back. Replace the detector at the end of its life, as the maker's guide states.
Testing
Test the detector monthly with its test button. In a monitored system, put the system in test mode first so that the monitoring center is not alerted.
Placement
Fit detectors on each level and outside sleeping areas. Keep them away from kitchens and bathrooms where steam or cooking smoke can cause false alarms.
Silencing and clearing
If the detector sounds from smoke or steam, fan the air and press the hush button. A chirp is a low battery or an end-of-life signal. After a real alarm, ventilate and reset the system as ADT's guide states.
Records
Keep a note of when the batteries were last changed and the date the detectors were fitted. ADT's service can replace detectors that have reached the end of their life.
Service and replacement
ADT can service and replace detectors that have reached the end of their life. Tell them the date on the back of the detector and the type. After a replacement, ask the technician to test the new detector and the connection to the panel.
Where to place detectors
Fit a smoke and carbon monoxide detector on each level and outside sleeping areas. Keep them away from kitchens, bathrooms and vents, where steam and cooking smoke cause false alarms. On a ceiling, place the detector at least a hand's width from the wall.

Where these figures were read. help.adt.com/article/blu-adt-smoke-co-heat-detector ("ADT Blu- Smoke and Carbon Monoxide (CO) Detector (SSSX5R0)")

Manufacturer support for this product line. ADT Support — ADT Blu- Smoke and Carbon Monoxide (CO) Detector (SSSX5R0). ADT's own overview and setup article for the dual-function Smoke and Carbon Monoxide Detector — a different model from the standalone smoke-only and CO-only detectors.

Also read for this model. ADT Help — ADT Smoke and Carbon Monoxide Detector SSSX5R0-29; ADT — ADT Carbon Monoxide Detector.

Exact questions

Questions that only have an answer for the ADT Smoke and Carbon Monoxide Detector

Is the Smoke and CO Detector the same hardware as the Smoke Detector with a setting turned on?+

No — ADT lists it as its own model number (SSSX5R0), distinct from the smoke-only (SSS5R0) and CO-only (SSCO5R0) detectors, not a software variant of either.

Does the combined detector need more batteries than the single-purpose ones?+

It uses three CR123A batteries, matching the standalone Smoke Detector and one more than the standalone CO Detector's two — reflecting the added CO sensing hardware, per ADT's own parts list.