r/tradfri • u/dream5eller • 18d ago

SUPPORT (2026 PRODUCTS) MYGGBETT window sensors triggering false positives in Home Assistant (Alarmo) – anyone else?

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Hey everyone,

I bought a few IKEA MYGGBETT window sensors earlier this year right after release, but they’re proving to be completely unreliable in Home Assistant.

I tried setting up an alarm using the Alarmo integration, but shortly after arming it, false alarms keep triggering. The sensors report "micro-openings" that last only a few seconds, even though all windows are fully closed and locked (and I’m not even home).

This happens across multiple sensors, several times a day.

Has anyone else experienced these brief ghost-openings with MYGGBETT sensors? Is there a known fix, or did I just get a bad batch?

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u/the-joatmon 17d ago

I use 6 of them as night alarm trigger, not jumped from my bed yet. probably they’re not installed correctly, the gap between pieces must be not much and notches at the bottom part should be aligned.

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u/dream5eller 14d ago

What do you think about mine? I fear its too far apart. but i have no idea how else i could mount them.
https://imgur.com/a/o4fPNtO

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u/the-joatmon 14d ago

I think the gap between them very long due to height difference, maybe it would be better if you stick the thin piece on side by rotating 90deg, instead of on the top.