20 Most Recent Chamberlain & Liftmaster Garage Doors Questions & Answers

The opener needs reprogrammed. If you know the model, look on the internet for programming instructions. Another possible problem could be an obstruction in the path for the safety electronic eye at the bottom of the door frame.

Chamberlain &... | Answered on Aug 10, 2015

try reprograming the clicker .the instructions and programing button are on the backof the unit usually by the antanae.If it is not operating with the wallbutton check for obstuction in the track or for something blocking the electric safty eye. Phil Anderson

Chamberlain &... | Answered on Sep 23, 2012

Wires of the same color go on the same terminal. Think of the capacitor as a shock absorber inserted in the circuit.

Chamberlain &... | Answered on Dec 31, 2011

I am presuming the following: is it that the door will not operate unless you hold down the button to "close the door"? And the button you are pressing is the hardwired wall button or control inside the garage correct? And if you try to close the garage door with the remote the overhead lights flash off and on or the motor make a clicking sound (about 5 clicks?)
The problem is either an obstruction of the safety sensors at the bottom of the door or, one or both sensor eyes are out of alignment. If you look closely at both safety sensor eyes on the part that faces into the garage, you should see a glowing LED. One side will be an Amber color and the other Green. If one is lit (amber) but the other is not (green), that is an indication that the beam is not being received by the receiving eye (amber).
If there is no obvious obstruction (check for spider webs, dust, try cleaning the clear lenses facing each other, etc,) Try re-aligning the sensors. When they are properly aligned the Green LED will be lit. Now, check the motor for operation.
If you have difficulty getting the transmitter eye (green LED) to light, try closing the door at the wall button, then, pull the red emergency release handle to disengage the door.
Now, try operating the motor unit with the door disconnected while using the hand held transmitter. If the motor unit operates to the close position while the door is closed but not when opened, then that sounds like there is sufficient light entering the garage to "Wash" the transmitter beam out so the receiving eye does not get it.
Contact Chamberlain/Liftmaster for Sensor eye blinder shields that can be easily installed by you. (they just snap on) If neither LED is lit, make sure that the wire to the sensor(s) has not been cut off at the sensor itself. If that checks out, check the connection at the logic board. Make sure that both wires are securely connected.
If after checking all of that, and you do not have either of the LEDs on, then disconnect the safety sensor wires from the motor unit's logic board. Then take a 2" piece of bell wire and jump it across the two terminals for the safety sensors. If the unit operates normally when using the hand held transmitter, then the problem is likely: a) Bad safety sensors b) Broken wire to one or both sensors
To check if the safety sensors are good:
Remove both sensors from their mounting brackets. measure about 8" to 12" of wire from the back of the sensors and cut. You should have about 8 - 12 inches of wire on each. Now, separate and strip the insulation from each and then match the white striped wires and twist them together, and do the same with the solid non-striped wires. Take the sensors up to the motor head and connect the spliced wires to their respective positions on the logic board. Now, Point the two sensors directly at each other (its okay if the clear lens part are touching each other) Check if both LEDS are now lit. 1) If YES; then the sensors are good, the wire to them is broken somewhere; [FIX] replace the wires for both sides. 2) If NO: then the safety sensors need to be replaced. [FIX] Replace the sensors, contact Chamberlain / Liftmaster for replacement parts. You will need your garage door opener's model # which can be found under the light bulb or light fixture on the opposite side of the logic board. Having the model # speeds up the parts search for you.
I hope this helps you out. [I have been factory trained on residential and commercial garage door openers by Chamberlain / Liftmaster and have been providing installation and tech support on them for over five years. Prior to that I used to install and repair these units, and I've done that for nearly seven years.]

Chamberlain &... | Answered on May 27, 2011

sounds like the rpm senor may have be out of place - the fingers on the cup must break the field between the sensor pickup

Chamberlain &... | Answered on Apr 28, 2011

If working with remote and/or keypad check wire from opener to doorbell/push button/wall controller.

Chamberlain... | Answered on May 14, 2014

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Building... | Answered 4 hours ago

CODING LED (red) light flashes when a code is being stored or when a transmitter button is pressed. opener. The opener has to be initialised by the Reset button to make the O/S/C button operable. this button will move the door in the close direction.


Building... | Answered on Feb 12, 2020

The carpet is probably glued down and also recessed under the wooden sections. To remove the carpet section is pretty easy, simply take a stanley knife or any heavy duty blade and cut out a small section of carpet near to the edge of where the carpet meets the wood and use this opening as a hand hold to lift the rest of the carpeting from the actual floor of the rv. You can then use a putty knife or similar tool to slide under the wooden sections and lift them. You can buy laminated wooden flooring in sections and replace the entire floor with this, using a jigsaw to cut the edges to match the outline of the surrounding areas. Hint: use pieces of sturdy cardboard to make templates of any edges that are not straight and transfer the outline to the flooring panels with pencil before cutting to ensure a good fit.

Building... | Answered on Feb 10, 2020

Might try calling a vendor of garage door openers for assistance:

Building... | Answered on Feb 05, 2020

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door will not operate unless hold down

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