What does a garage door spring do?

In principle, this means a garage door spring is supposed to make your door light enough for you to be able to lift it on your own, or for the power of the garage door opener to lift it up easily. There are two main kinds of residential garage door springs: torsion...

Why do I have to hold down my garage door button for it to close?

When the infra-red sensors are not working properly, usually one of the sensor lights will be blinking. The problem is either due to a blocked path between the sensors, dirty eyes, loose wires at the sensors or at the motor head, or just bad sensors. The transmitters...
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