[header] How to align garage door sensors [title] Turn off the power to your sensors by tripping the fuse for your garage. [step] You'll find this in your home's breaker box. [substeps] You won't actually be working with the electrical wiring, but it's always best to be safe when working with electricity. 
[title] Loosen the screws that mount each of your garage door sensors. [step] Don't take them all the way out.