# Fibaro dimmers causing irritating sound **URL:** \ **Category:** Devices\ **Created:** [September 13, 2019, 5:26am UTC](https://community.homey.app/t/fibaro-dimmers-causing-irritating-sound/18067 "2019-09-13T05:26:09Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Jo\_San](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jo_san/32/3732_2.png) [@Jo\_San](https://community.homey.app/u/Jo_San)\ **Post date:** [September 13, 2019, 5:26am UTC](https://community.homey.app/t/fibaro-dimmers-causing-irritating-sound/18067/1 "2019-09-13T05:26:09Z")
I have a number of Absinthe Prism wall lights (230v/5W). Some are behind Fibaro switches, some behind Fibaro dimmer 2. The ones behind the switches work perfectly and silent. The ones behind the dimmer 2’s make a very irritating sound at the lamps integrated trafo’s. As I can’t seem to see whether auto calibration has set leading or trailing edge mode, I have tried to force them both. No effect. I added a bypass to one, also no effect. Any ideas? The sound is so irritating that I am thinking of ditching the dimmers. ---
**Author:** ![Jo\_San](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jo_san/32/3732_2.png) [@Jo\_San](https://community.homey.app/u/Jo_San)\ **Post date:** [September 13, 2019, 1:51pm UTC](https://community.homey.app/t/fibaro-dimmers-causing-irritating-sound/18067/2 "2019-09-13T13:51:36Z")
Is there a way to see what values are set for for example load control mode (param 30)? In the app and developer toolbox it seems parameters are only shown until param 29? ---
**Author:** ![Jo\_San](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jo_san/32/3732_2.png) [@Jo\_San](https://community.homey.app/u/Jo_San)\ **Post date:** [September 17, 2019, 9:03am UTC](https://community.homey.app/t/fibaro-dimmers-causing-irritating-sound/18067/3 "2019-09-17T09:03:20Z")
Looks like I am the only one with buzzing / humming LED lights in combination with the Fibaro dimmer 2’s. Or the only one that is really bothered about it 🙂 I have about - Kitchen: 10x GU10 7W in Dimmer2. Calibration succesful. Lights are Humming/buzzing at all dim levels causing really irritating noise. Lights are Interlight IL-C7GD36 - Kitchen: 5x GU10 5W on Dimmer2: Calibration succesful. Lights are Humming/buzzing at all dim levels causing really irritating noise. Lights are Interlight IL-C7GD36 - Living room: 4x GU5.3 spots via Delta LED driver on Dimmer 2. Cheapest Philips LED’s. No problem whatsoever. - Living room: 1x E27 dimmable LED 11W on Dimmer 2 - brand unknown. No problem. - Living room: 3x Absinthe Prism light with integrated 6W Led on Gallop driver, dimmable via trailing and leading edge. Humming / buzzing like crazy. Tried leading and trailing edge. Also with and without bypass. Tried a Fibaro Switch 2, no sounds. So it has something to do with dimming. At first I thought I could live with the noises but it is driving me crazy. I am thinking of ditching all Dimmer-2’s but was hoping someone with same experiences had the golden tip… ---
**Author:** ![Igy](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/igy/32/22144_2.png) [@Igy](https://community.homey.app/u/Igy)\ **Post date:** [September 17, 2019, 2:45pm UTC](https://community.homey.app/t/fibaro-dimmers-causing-irritating-sound/18067/4 "2019-09-17T14:45:47Z")
Its most probably the light/bulb causing this issue. I have several Fibaro dimmers at home and also one qubino dimmer. I had this humming issue with both, Fibaro and Qubino dimmer with one specific dimmable GU10 leds. Once I chaged them (used Ikea dimmable GU10 400lm leds), this problem disappeared. ---
**Author:** ![Jo\_San](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jo_san/32/3732_2.png) [@Jo\_San](https://community.homey.app/u/Jo_San)\ **Post date:** [September 17, 2019, 2:52pm UTC](https://community.homey.app/t/fibaro-dimmers-causing-irritating-sound/18067/5 "2019-09-17T14:52:28Z")
Thanks for replying. I just ordered replacements for the GU10’s, hope that does the trick. The lamps with integrated (dimmable) led’s will remain a bit of an issue I think. Maybe Qubino’s new Mini dimmer can make a difference, but that one is not yet supported on Homey. Otherwise I will make them non-dimmable.