Direct answer
A contact sensor can misread when magnet alignment, gap, orientation, battery or mounting has changed. Move the magnet near the sensor before deleting it from the system.
What this covers
- The observed symptom matches this record
- Customer-accessible settings, connections and external components
- Diagnosis before reset, deletion or component replacement
What it does not cover
- ×A model-specific error code with a different documented meaning
- ×Internal electrical, battery-cell, gas, refrigeration or sealed-component repair
- ×A guarantee that every model exposes the same control label
Capture the exact symptom
ReversibleWatch live status while slowly bringing the magnet to the marked side of the sensor.
Run the smallest isolation test
ReversibleReplace the battery if low and realign within the specified gap using temporary tape for testing.
Correct only the proven cause
ReversibleRemount securely after confirming the exact alignment; re-pair only if the sensor never changes state nearby.
Verify before changing anything else
ReversibleOpen and close ten times and confirm automations receive every event.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Exact questions
Common follow-ups
What should I check before resetting anything?+
Watch live status while slowly bringing the magnet to the marked side of the sensor.
What is the safest isolation test?+
Replace the battery if low and realign within the specified gap using temporary tape for testing.
When should I stop troubleshooting?+
Do not defeat entry sensors used for safety/security; service damaged housings or wiring.
Answer for the exact device and software version shown above.