20 Most Recent
Questions & Answers
Light does not come on when I open/close door, not the bulb
I also substituted Floescent Bulbs for the standard bulbs. The bulbs would not light up although the relay was working. It seemed that the Florescent bulbs had a somewhat shorter neck. What I did was unplug the drive system from the outlet and then bend the metal connector in the socket so that it would come out further towards the opening of the socket. I then repluged the drive. The Floercent bulbs now have contact and are working perfectly. Simple problem with a simple solution.
on Oct 09, 2019
IS MY 139.53754-01 REMOTE COMPATIBLE WITH MY
This is the most difficult question to answer because technologies and frequencies have changed and there is not a good way to check. If you program the opener to this remote and your other remotes quit working or if it will not program at all then you know the answer.
on Jul 16, 2019
Cannot find compatable keyless entry
The keypad listed for your model is 53876. If this is the keypad you presently have and the remote no longer works after you program the keypad it could be the remote that is bad. Sounds strange but it is true. Make sure you are programming the keypad like this.
the smart/learn button on the rear of the motor unit near where all
those white wires go. Press and immediately release this and then
walk over to the keypad and key in any 4 digit code you like and
on Jul 16, 2019
Light will not come on when you walk into the
To have your lights come on automatically when you walk into an open garage you must START with the lights ON. To turn the feature on, turn the lights on manually with the wall switch, then press and hold the LIGHT button for about 10 seconds until the motor unit light bulbs flash.
Now, if the light bulbs are on, manually turn them out and then walk out through the open door. The light bulbs should come on.
To disable this feature, start with the light bulbs OFF and everything else is the same.
on Jun 14, 2019
Liftmaster garage door intermittent power loss
I had the same problem. Although it appeared to be the logic board, on mine it actually was the connectors between the logic board and the power supply board.
There are 2 connections on the logic board. One white connector with wires going to the main unit, and another set of connectors that plug directly into the smaller circuit board that holds the step-down transformer (120vac - 22vac). These pins were not making good connection between the boards. I simply bent the pins slightly so they would make better contact on the logic board and have not had a problem since. This must be a weak point on these door openers. Purchasing a new logic board would work too, as the connectors are newer and tighter.
on May 28, 2019
Garage door opens by itself
From Chamberlain's website: There are a few different things that can cause this type of problem.
at the LED light next to the SMART/LEARN button on the motor unit. If
you are facing the garage door, the SMART/LEARN button is located on
the rear end or right hand side panel of the motor unit. You may need
to remove a light lens cover in order to see it. This button is either
purple, red/orange, green, yellow, grey, or white in color. If the
light is flashing rapidly this means you have a stuck button on one of
your remote controls. Take the batteries out of each remote control.
When you remove the batteries from the bad remote, the light will stop
flashing. This remote needs to be replaced.
- If one of your
neighbor's remote controls is inadvertently programmed into your
receiver, your door will open when their remote is activated. If this
happens you will need to clear out your receiver and reprogram your
- Press and hold the LEARN button for six seconds, or until you see the small LED light near the button turn itself off.
the above steps have been followed and the symptoms continue, there may
be an electronic short in either the wall control button or the
receiver logic board. In this case, remove the wall control wires from
terminals one and two (or red and white) on the motor unit. Should the
symptoms persist after the wires are removed, replace the receiver
logic board. If the symptoms stop with the wall control wires removed
from the motor unit, replace the wall control button, and the wires
leading to the wall control button.
on Mar 08, 2019
How do I reset my garage door opener. It is a
The Coromaster 2000 does not operate off limit switches. It has a
quarter-revolution optical pulse counter. To re-program the open and
close limits do the following:
Ensure that the door is open at least a couple of feet.
Press the reset button once or twice
Short out pushbutton and common and hold until close limit and then
Door should stop at your new close limit.
Wait 5 seconds. Short out pushbutton and common and door will open.
Hold the short until open limit and then release.
Limits should now be set.
on Feb 10, 2019
Garage door senser not working
One possible reason. (RF) Interference from an ultrasonic humidifier. The radio wave created to create the mist will cancel out a garage door opener I learned it the hard way I almost replace two garage door opener's but I turned off humidifier and everything worked in my Internet works better now too. Just passing this tip on hope I helped.
on Dec 29, 2018
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