The ADT Water and Temperature Sensor watches for leaks and for temperature changes, and automations built on it are among the most valuable in a smart home, since a leak or a freeze can cause expensive damage, but they only work if the sensor is placed, named and connected well. Begin with the sensor's own alerts in the ADT app. Choose which events notify you: water detected, a temperature below a set limit or above one, and a low battery.
The checks in more detail
Set the temperature limits to suit the place, for example a few degrees above freezing for a pipe space, and a high limit for a freezer or boiler room. Make sure notifications are allowed on every phone that should receive them, and consider adding another person as a user so that someone is always alerted. Placement is half the automation. Put the sensor where water will reach it first: on the floor beside the water heater, under the sink, behind the washing machine, near a sump pit or by a basement window.
The probe or contacts must touch the floor. For temperature, place it where the reading matters, away from direct sun and heating vents. Name it clearly, such as Basement water heater, because the alert will say it. Test it with a damp cloth on the contacts and check that the app reports the leak. Further automations depend on what your system and integrations can do. If the app supports rules, you might switch on a siren or a light when water is detected, or notify a second person.
If a smart water shut-off valve is linked through an integration, a rule can close it on a leak, but that depends on the platforms involved, so read what is supported. Replace the battery on schedule and check the sensor's signal, since a leak sensor that is offline protects nothing. Do not rely on an automation as the only defense; keep the alarm and a plan to shut off the water. Contact ADT support if a documented rule fails.
Differential
Likely causes of “ADT Water and Temperature Sensor routine, schedule or automation is not running”, and how to tell them apart
- 1
The sensor in the wrong place
What separates it A leak goes undetected
How to confirm Place it where water first reaches it
- 2
Temperature limits not set
What separates it No freeze or heat alert
How to confirm Set sensible limits in the app
- 3
Notifications off
What separates it Nobody is told
How to confirm Allow notifications and add a second user
- 4
A weak battery or link
What separates it The sensor is offline
How to confirm Replace the battery and check range
Before you touch a setting
Record this first — changing settings destroys the evidence
- The device's state in the app
- The battery or power
Try in this order
0 of 5 completedSet alert types and limits
ReversibleIn the app.
Place the sensor where water will reach
ReversibleThe floor near risks.
Test with a damp cloth
ReversibleCheck the alert.
Add rules where supported
ReversibleSiren, light or valve.
Keep the battery fresh
ReversibleAnd the link strong.
Model-specific
What is true of this model and not of its siblings
- Placement
- Water must reach the contacts.
- Limits
- Set them for the room.
Stop boundary
When this stops being a self-service repair
- !If the problem persists after these steps, contact ADT with the device and system details
- !Do not disable a safety device
Evidence ledger
Sources behind this answer
Exact questions
Common questions
What can it alert on?+
Water and temperature limits.
Where should it go?+
On the floor near the water source.
Can it shut off the water?+
With a supported valve and integration.