Our bottom left wheel of the garage door came off the track and is now resting in front of the track while the other wheels are still in the track as they should be. This is putting tension on the lower section of the garage door. Is there a way to take this wheel off or an easy way to get the wheel back onto the track?
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The door has an infra red sensor on the door or on the track at the two bottom edges of the rail which stops the opening or closing if something is in the way. You need to get inside and remove anything that is close to the bottom edge of the door on its travels.
Something could be binding in the track. Try lubricating all the moving parts. Also, the IR sensor at the bottom, which is designed to prevent the door from hitting something, could need to be aimed again. On mine, the IR sending unit at the bottom was burned out. If you have the installation manual, it may have a trouble shooting guide.
a safety is engaged. do the lights on the motor blink when it attempts to close. check the lights on the safety eyes at the bottom right and left of the door tracks. check the down pressure setting. replace the circuit board if it is a wiring issue
IF the wall mounted button works the same way (opens, but not closes), it's probably the infrared beams (located near bottom of both side door tracks) are not aligned, lenses are blocked by something, lenses are dirty, etc.
You probably have a stripped gear. Take the cover off the opener and the bottom will be filled with white shavings and the gear will be missing teeth. You can repair with a liftmaster gear and sprocket kit.
IF THE DOOR CLOSES ALL THE WAY WHEN HOLDING DOWN THE WALL BUTTON AND REVERSES 6" FROM THE FLOOR WHEN NOT HOLDING THE BUTTON.
I WOULD GUESS THAT THE SAFETY EYES ARE MOUNTED ON THE TRACK.
WHEN THE DOOR CLOSES THE TRACK AT THE BOTTOM IS TOO TIGHT CAUSING IT TO FLEX AS THE DOOR GETS NEAR THE BOTTOM. WHEN THE TRACK FLEXES THE EYES ARE POINTING FURTHER AWAY FROM THE DOOR AND EVENTUALLY THEY ARE TOO FAR OUT OF ALINMENT AND THE LED WILL GO OFF - THE DOOR GOES BACK UP.
SOLUTION: YOU CAN USE THE CLAW END OF A HAMMER TO TAP THE TRACK OUT A LITTLE WIDER - TAP NEXT TO THE WALL ON THE BRACKET THAT HOLDS THE TRACK TO THE WALL. MOVE THEM ABOUT 1/4" EACH SIDE.
YOU CAN MOUNT THE BRACKETS TO THE WALL OR THE FLOOR.
Check the photo sensors at the bottom of the garage door tracks, and make sure each sensor can 'see' each other. Normally theres LED lights on them to let you know they are aligned. Both LEDs should be on and not blinking.