Your Google Nest Mini is sitting on the shelf, but when you say "Hey Google" the four lights stay dark. No response, no chime, no assistant. You've checked that it's plugged in and the power cable is snug. Let's walk through the most common reasons this happens and how to get the wake word working again.
First thing to check: the physical mic mute switch on the back of the device. It's a small slider next to the power port, marked with a microphone icon and a slash. If it's slid to the right (the muted position), you'll see a steady orange glow from the four LED dots on top. Slide it back to the left. The orange LEDs turn off immediately, and the mic comes back online. This switch gets bumped more often than you'd think, especially if the Nest Mini is on a shelf or near a wall.
Power Cycle the Nest Mini
Unplug the power cable from the device (not the wall end). Wait 30 full seconds, then plug it back in. The Nest Mini will boot up, showing a quick white light animation, and within about a minute it should be listening again. This clears any stuck audio pipeline or temporary glitch that can mute the wake word processing.
If the orange lights stay on after the restart even with the mute switch in the unmuted position, the physical switch itself may be worn out. The Nest Mini has been around since 2019, and the mic switch can become unresponsive after years of use. In that case you'll need to move on to the software fixes or factory reset.
Re-train Voice Match
Voice Match lets up to six household members use their own wake word and get personalized responses. If you're the only one the device ignores while others get through fine, Voice Match has gotten confused. Open the Google Home app, tap your profile picture in the top right, then go to Assistant settings > Voice Match. Tap your name and choose "Re-enroll" or "Teach your Assistant your voice again." You'll say four phrases like "Hey Google" and "Okay Google" in your normal speaking voice.
This takes about a minute. If you've had a cold, allergies, or any voice change recently, this is almost certainly the fix. The Nest Mini's voice model relies on recent enrollment.
Adjust the Wake Word Sensitivity
In the Google Home app, tap your Nest Mini's device tile, then Settings > Hey Google sensitivity. Drag the slider toward "Most sensitive." This makes the device respond to a quieter or farther-away "Hey Google." If you or someone in the house accidentally turned this down, the wake word might not register in normal conversation. You can test it by saying the wake word from different spots in the room after adjusting.
One thing to note: the Nest Mini's volume controls are on the top corners, not the center. Tapping the center top, near the LED area, activates the mic for a manual command, but it's not the volume button. So don't confuse a tap on the center with a volume adjust that's a different gesture.
Quiet the Background Noise
The Nest Mini (2nd Gen) has two far-field microphones. That's enough for most rooms, but loud TVs, a running dishwasher, or an HVAC vent right next to the device can mask your wake word. Try saying "Hey Google" from about three feet away in a quiet room. If it works, the issue is ambient noise. Move the Nest Mini away from the noise source. You can also use the app to check that no other device in the room is answering instead sometimes another smart speaker is closer.
Update the Google Home App
The Nest Mini relies on the Google Home app (iOS 16+ or Android 9+) for wake word processing and Assistant responses. If the app is outdated, the device can get stuck. Open your phone's app store and check for a Google Home update. After updating, force close the app and reopen it. The Nest Mini should sync its setting within a minute or two.
Also note: Gemini for Home is rolling out in 16+ countries as of April 2026. If your account is still on the legacy Assistant, you might see a banner in the Google Home app to opt into the migration. Sometimes the migration itself can cause a temporary wake word delay. If you're seeing that banner, going ahead with the opt-in can help.
Factory Reset the Nest Mini
If nothing else has worked, a factory reset is the final step. Slide the physical mic switch on the back to OFF the four LED lights will turn orange. Then press and hold the center top of the device for about 15 seconds. You'll hear a voice prompt saying "You are about to completely reset this device. Release to cancel." Keep holding. After another few seconds a reset tone confirms the factory reset is done. The device will restart as if brand new.
Set it up fresh through the Google Home app. This wipes all Voice Match enrollments, paired devices, and custom routines. You'll need to re‑enroll your voice and re‑add any smart home controls. But it also clears any deep‑seated software glitch that was blocking the wake word.
