Has the volume of your fan returned to normal? If not, can you check what @primal_healer mentioned? If the “Glowforge air filter attached” switch is on, that will slow the exhaust fan down to allow the Air Filter to exhaust your Glowforge better.
Could you please try the following?
- Log in at app.glowforge.com
- Click ‘Trace’
- Click on the gear icon in the top blue toolbar
- The menu should look like this screenshot
- If the filter switch is on, the fan will be turned off. If the switch is off, then the fan will run normally.
Can you try turning the switch off and see if that sounds normal?
Let me know how it goes.