liftmaster Chamberlain Garage Door Opener Transmitter 300MC "down try closing" Questions

...our door with us unaware, last night we came home tried to open the door, it tried to go up and down about 15 times. The door will close but won't stay closed and the door won't open completely. ...

...door starts back up. I've checked the force adjustments. I went from both extreme settings on the "down" dial and there was no improvement. I've also lubricated the rollers and spring. Check the

...or green) when the eyes 'see' each other. If they are not 'seeing' each other then they make you go into override mode which requires the button to be held down. Try re-aligning and see if that ...

Door closes but bounced back immediately. No lights blinking, no obstruction, we turned the down forced clockwise, but unable to fix it. I did notice the roll bar is not stopping at the end of the ...

...try to close the door. I can make it close by pushing hard on trailing edge of the door to force it closed. It does not do this at any specific point in the travel. It can happen at the start of the ...

...try to close it, it is most likely to go down. it opens with no proplem Disconnect the door from the opener and run the door up & down by hand. It should be smooth both ways. Check that your ...

...try using a screwdriver to adjust the open/close distance. Start with a 1/4 turn for each position, and play with it until you find the right setting. If these suggestions don't address your problem, ...

...WORKING TRY TO INCREASE THE DOWN FORCE OF THE GARAGE OPENER 1/4 TURN UNTIL CAN CLOSE IT... AND IF ISNT WORKING STILL MAYBE UR TORSION SPRING OF UR GARAGE DOOR HAS TOO MANY TURNS.. CALL A

...down. The sensors at the bottom of the door has a green light on one side nad the other has a yellow light. Both stay on unless you block the beam. Your door switch is bad. You can get one at home ...

...down, but fully opens. Worked fine until my wife closed the door on the car, after that it would fully close I had this problem as well with the door opening just fine but was not closing when using ...