Garage door sensors.
I just had this happen to my garage door, pres the opener, garage door cones down about a foot and goes back up. Checked sensors, and red light was out on the one sensor, so tried to re align them, with no success, Went on Amazon to find a pair of sensors, but no luck. Went on E-Bay, and found them right away. Ordered them, right around $60.00, got them in 3 days, took them out to the garage and installed them in about 10 minutes, very easy install, don't have to turn of electricity, low voltage wires. Red light came on immediately, I went and pushed garage door opener, and all worked perfectely.
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