Your Nest Hub Max just stares back at you, the display glowing, but it won't respond to "Hey Google." You've tried speaking directly at the top grille, moving closer, even yelling. The screen stays on ambient mode. No blue bars pulse. No Assistant answers. A few things cause this a muted microphone, a lost Wi-Fi connection, Voice Match confusion, or the ongoing Gemini for Home migration.
First, check if the mic is actually on. The Nest Hub Max has a physical mute switch on the back, near the power cord port. Slide it toward the unmuted position (the orange light on the front should turn off). Also swipe down from the top of the screen and look for the microphone icon. If it's crossed out, tap it.
Power Cycle the Display
Unplug the power cable from the back of the Nest Hub Max. Count to 30, then plug it back in. The Google logo appears, the device boots, and within about 90 seconds the Assistant should be ready. This clears any temporary software hiccups or stuck audio states.
Re-train Voice Match
If the device responds to other people but not to you, Voice Match has lost your voice profile. Open the Google Home app, tap your profile picture in the top right, then tap Assistant settings > Voice Match. Find your name and tap Teach your Assistant your voice again. Say the four wake phrases when prompted. Since the Nest Hub Max uses Voice Match alongside Face Match, a cold or seasonal allergy can throw off the voice model. Re-enrolling takes about 60 seconds and fixes it immediately.
Adjust Wake Word Sensitivity
In the Google Home app, tap your Nest Hub Max device. Tap the settings gear, then scroll to Hey Google sensitivity. Move the slider toward Most sensitive. The device will wake for fainter wake words spoken from further away. If the slider was accidentally lowered common after a firmware update bumping it back up restores normal behavior.
Check Background Noise and Placement
The Nest Hub Max's two far-field microphones are good, but loud TVs, dishwashers, or HVAC vents nearby can mask the wake word. Mute the noise temporarily and say "Hey Google" from about 5 feet away. If it responds in silence but not in your normal room, the mic is fine the environment is the problem. Move the Hub further from noise sources or adjust your speaking position.
Verify the Gemini for Home Migration Status
Google is rolling out Gemini for Home to Nest Hub Max units across 16+ countries through 2026. If your device is mid-migration, the mic may register the wake word but the cloud response never comes. Open the Google Home app and look for a banner prompting you to enroll in Gemini for Home. Opt in if you see it. After your account fully migrates usually within 24 hours the Assistant resumes normal wake word response.
Test the Microphone Hardware
Open the Google Home app, tap your Nest Hub Max, then tap the microphone icon in the top right of the device card. Say something like "What time is it?" If the Hub responds, the mic hardware works. If it doesn't respond to that direct command either, the mic may be physically failing. There are no user-replaceable parts here; contact Google support for repair or replacement options.
Factory Reset the Nest Hub Max
If none of the above helps, a factory reset is the final step. Locate the two volume buttons on the back of the device. Press and hold both simultaneously for about 10 seconds. You'll see the screen go dark, then the Google logo reappears. This wipes all settings, Wi-Fi networks, linked accounts, and Voice Match data. Set it up fresh via the Google Home app afterward. There's no separate soft-reset button on the Nest Hub Max power cycling is the only non-destructive reboot.
