Each sensor will usually have a light. One will have a green light, used to show that the units are powered up, and the other will have a red light to show that there's no obstruction between the sensors and that they're 'seeing' each other. Feb 12, 2020
First, know which parts you have to lubricate. These should all be included in your regular maintenance schedule. Springs: The springs that help lower and lift your garage door should be lubricated regularly. You will most likely have torsion or extension springs.
Garage Door Bent at Bottom However, the fix could be as simple as hammering the dent out, depending on the extent of the damage. In these cases, experts use soft rubber mallets, suction cups, or heat to gently tap, pull, or warp the dent until it returns to its original shape. Apr 20, 2022