Question about Electrical Supplies
I have a LiftMaster Formula 1 garage door opener which won't stay closed. I have to clock the remote or wall switch a second time when the 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 down limit:
If the light bulb(s) on your operator are on the front and/or back, the limit adjustment screw is on the left side of the operator (looking from the back of the operator and facing the garage door).. If the lights are on the sides of the operator then the limit adjustment screw is on the left side (looking from the back of the operator and facing the garage door)
Posted on Jan 04, 2009
My garage door wont shut down if I press the door opener one time. The only way to close it to Hold on the door opener until it hits the ground. Looking at the two sensors, they appear to be fine and there are no objects around the area.
Any idea is greatly appreciated.
Posted on Dec 07, 2009
Door Tech failed to say "turn the Down Limit say one turn opposite the arrow, to make door close less"
Posted on Dec 30, 2009
Excellent advice from Door Tech! I had read many other solutions and tried to follow them, but he was the first to give the correct side of the operator box to work on.
Thanks so much!
Posted on Jan 04, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
Feb 28, 2013 | Sears Craftsman LiftMaster Chamberlain...
Jan 21, 2012 | liftmaster Chamberlain Garage Door Opener...
If when closing the door it reverses to the open position and the main light flashes 10 times it is a door sensor problem. Make sure the small light on each sensor is on and not flickering ever so slightly. (check closely) Tweak them a little even though they may seem to be okay. Check for 5vdc between terminals 2 and 3 on the rear of the motor unit. If there is no voltage or if it is greater than 6vdc the logic board is bad.
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May 22, 2017 | Electrical Supplies
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