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I've got multiple Hue White bulbs, multiple Dimmer switches and a second generation Hue hub. Sometimes, pressing a dimmer button doesn't result in the bulb reacting in any way. Sometimes I have to press multiple times to switch the light on or off. Sometimes I even have to use the hard switch to get what I need. All 5 dimmers in my house have already (<1 year) exhibited this behaviour at least a couple of times. Some are worse than others.

I think I've never seen my lights ignoring the Hue app.

I wonder what the reason could be and what troubleshooting I could do. All distances are very reasonable (max distance between 2 nearest bulbs is <5 m). Usually the system works. Sometimes the devices that fail in this way are actually those located the closest to the hub.

I would also like to know if the dimmer is actually connected to the bulb directly or via the hub.

texnic
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2 Answers2

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I have seen this behaviour when my hub was located next to my wireless router. One of the antenna sleeves on the router came off and disrupted communications to the hub from my lights & dimmer switches.

ZigBee and Wi-Fi frequencies overlap on certain channels (2.4 Ghz) so you could try to change the channel in the Hue app, if moving the hue hub further from the router isn't an option.

Helmar
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Ian Bennett
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I know this is an old thread, but it shows up on google under quite a few different searches. I had a similar issue where pressing a button on the dimmer would do nothing other than flash the little led under the top button multiple colours.

A couple of years ago I discovered the solution, take the battery out, and put the battery back in. every few months one of my dimmer switches (I have about a dozen) goes funny and I just do this hard power cycle and it comes right instantly then works perfectly.

of course check the basics, wifi channels, interference, range between bulbs, etc, etc, but if you've done that and you're still tearing your hair out, give this a go.

For me nothing else I tried worked, not even pressing/holding the factory reset button with a pin.

Kelly Larsen
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