Garage door infrared sensors are safety devices that prevent the door from closing should an object interfere with the infrared beam. Your garage door opener will not work if the infrared sensors are misaligned, damaged or faulty. When replacing infrared sensors, you must remove the current sensors including the low voltage wire if the wire is visible. The sensors remove and install in similar fashion among all the garage door opener manufacturers.
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Things you need
- Step ladder
- Step stool
- Phillips-head screwdriver
Position a step ladder or step stool under the garage door opener motor head and pull the power cord out of the ceiling outlet. Locate the low voltage wire that connects to the back of the door opener head. The first four wires on the left are usually the wires for the infrared sensors. two are white and two are black/white.
Loosen the screws securing the wires to the back of the opener with a Phillips-head screwdriver. Some openers use a quick connect to secure the wires. Simply lift the plastic tab at each wire and pull the wire end away from the opener motor head.
Disconnect the wires from each infrared sensor. Most sensor wires plug into the back of the sensor much like a telephone line into a jack. Press the small tab down and pull the wire out of the sensor.
Turn the wing nut or nut securing the sensor to the mounting bracket counterclockwise with a wrench or your fingers. Remove the sensor from the bracket. Remove the nut and bolt securing the mounting bracket to the door track with a wrench and remove the bracket.
Starting from the wall, pull the low-voltage wire staples loose and remove the wire completely, if the wire is exposed. Some homes are pre-wired for the opener when the garage is built. You can usually reuse the wire if it is behind the wall because this type is often a thicker gauge and less likely to have breaks.
Tips and warnings
- Disconnect the door opener arm from the opener trolley until you replace the infrared sensors. This enables you to operate the door manually.
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