How to check your smoke alarm 🚨 Press and hold the Test/Hush button for 5 seconds! penderfire ✅ If it’s working, the alarm will sound. 🔗 Got interconnected alarms? They should all go off together! 🔥 Combo smoke/CO alarms? Just press and release to test the whole system. Stay safe—test it today! #smokealarm #awkward #instagood #firefighter #viral