# Fibaro Dimmer 2 - Bulb flicker after several days

**URL:** https://community.homey.app/t/fibaro-dimmer-2-bulb-flicker-after-several-days/154287
**Category:** Devices
**Tags:** z-wave
**Created:** [April 28, 2026, 5:13am UTC](https://community.homey.app/t/fibaro-dimmer-2-bulb-flicker-after-several-days/154287 "2026-04-28T05:13:25Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Julien\_Moors](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/julien_moors/32/26538_2.png) [@Julien\_Moors](https://community.homey.app/u/Julien_Moors)
#### Post date: [April 28, 2026, 5:13am UTC](https://community.homey.app/t/fibaro-dimmer-2-bulb-flicker-after-several-days/154287/1 "2026-04-28T05:13:25Z")

</div>

Hello,

I have several Fibaro Dimmer installed downstair in my house with dimmable leds. No problem si ce 2 years.

Last week, I installed a Fibaro Dimmer 2 in a sleeping room (upstair) OK but after 1 week, when I turn on the light (with app or physical switch) the light start flickering (every 0.2 or 0.5 sec).

The bulb are the same as downstair but I tried qnother bulb, I ordered another dimmable bulb on ebay \> always the same problem.

I installed the fibaro on an other switch to test but same behavior.

So I décide to replace the fibaro, I install another one and it’s work… 2 days… exactly same behavior. Even in another place in the house.

After starting flickering it seems like the fibaro is broken.

It was a 2 ways wiring (like everywhere downstair) but I tried 3 ways wiring with the 2 ‘default’ fibaros. No more flickering BUT no more dimmable feature ! It’s on or off. And when I try to dim via Homey app, the switch goes up or down automaticaly and sometimes I received « TRANSMIT\_COMPLETE\_OK ou NO\_ACK« .

What happens with this ? How to test something ?

Thank you