Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

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I have a liftmaster professional formula 1 and am trying to get the opener to sync with my car. is there a roaming setting on the unit that needs to be worked with in order to have it sync with my car(lexus)

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You have to first have your cars Homelink system learn your current remote (follow owners manual) THEN have the garage door opener learn the cars Homelink (push openers learn button then press the Homelink button you previously had learn your remote. Two learning steps required because the LiftMaster is a 'rolling code system'

Posted on Oct 22, 2012

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GOTO HOMELINK.COM & GET THE INSTRUCTIONS - THEY MAKE THE UNIT IN YOUR CAR.

Posted on Oct 04, 2010

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1 Answer

Garage door will not close from remote or car. Garage door will open from remote or car; however, it will not close using these controls. The only way I can close the garage door is to press on the manual...


Try reprograming the opener to each remote, if this doesn't work then the command/radio module in the opener is damaged and needs to be replaced. Hopefully you can find one or you will have to replace the whole garage door opener. Good luck.

Jan 21, 2012 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Liftmaster Professional Formula I, will not close.. Goes down and hits floor and open up again. Thank you


On the operator is a screw adjuster for how far down the door goes. Find this adjustment and rotate it in the direction of less travel. Then you may have to spend a few minutes setting it so the door closes snugly.

Gary

Aug 31, 2011 | liftmaster Chamberlain Garage Door Opener...

1 Answer

I have the Liftmaster Chamberlain Professional Formula I model 102.1499A and for some reason, the learn button will not sync with the homelink on two of my cars. Is there a way to reset the learn button? ...


Here is the information I have for homelink.

  1. Clear out anything previously programmed into the in-car system from the factory by holding down on the 2-outside buttons simultaneously, until the in-car LED starts flashing rapidly. This may take up to a minute (in most cases, the key should be on auxilary, and/or the car door must be shut).

  2. Decide which button you want to make to be your in-car garage door transmitter. Hold your transmitter up near the selected button, pressing both the garage door remote and the selected in-car transmitter button simultaneously. Hold down on the buttons until the in-car, LED light flashes rapidly. This sets the in-car remote transmitter to be your garage door openers make transmitter, but you are not done. You now need to make this in-car transmitter your personal transmitter.

3. Go to the Learn Button on your garage door opener. The button is usually next to the area where the floppy antenna is connected to the motor head. With Genie it is most often behind the light lens, and an indicator light flashes red when pressed. With Sears or Liftmaster (Chamberlain) it is near, or part of, the terminal screw board, and is a red, green or purple square button with a green, amber or purple indicator light. Press this learn button momentarily. The indicator light will turn on and blink if Genie or otherwise stay lit. For Genie systems, go back to the in-car transmitter button you programmed and press this button 3 or 4 times, or until the door starts moving. This should set your in-car transmitter to your garage door opener. For Liftmaster, Sears, or Linear Megacode press and hold the in-car button you programmed until the garage opener light flashes. Your in-car is now programmed to operate your door.



Jan 04, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Where can I get a copy of the owners manual for Liftmaster Professional Formula I garage door opener?


Go to this website and put in your model number.

http://www.liftmaster.com/consumerweb/service/manuals

Oct 10, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

I have a chamberlain liftmaster professional Formula 1 Garage door opener that has been working for 5 years. Now will not go down unless you hold the main button. Sensors blink when it hits within 3...


Anytime the main light flashes 10 times and the door reverses to the open position it is a door sensor problem. They each have a small light that should be lit, both should be the same brightness and not flickering ever so slightly. If not tweak them a bit. If both lights will not come on you have bad sensors.

Sep 27, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My liftmaster professional Formula 1 goes down and back right away so it does not close. what can be done?


Look at the led light up on the motor. If it is blinking 5 times you will need to replace the rpm sensor. If it is not make sure the door is balanced and running smoothly with out the help of an opener. If not fix that first. If so try turning up the down force clockwise 1/8 turn. Thanks BB

Sep 27, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

I Have a Liftmaster Professional Formula 1 garage door opener. When we press button on wall or garage door opener, we hear the motor going but the garage door doesn't do anything. Do I need a new opener?


Hi,
There is a rope or string hanging down that releases the dog that hooks the door to the chain...if someone pulled that the door will not open. You need to pull down and back on the srting to relaese the dog and then push the door up to catch the chain...then the door will work again...

heatman101

Aug 14, 2010 | liftmaster Chamberlain Garage Door Opener...

2 Answers

Chamberlain Lift Master Pro Formula 1 only makes click sound


Is the door stuck in the open position? If so the trolley is probably jammed against the bolt just in front of the motor unit. Loosen the chain enough to free the trolley and then run the opener until the door is closed. While the door is closed locate the 'up limit' on the side of the motor unit and turn this control 2 complete turns in the opposite direction of the arrow printed on the cover. Tighten the chain.

Apr 03, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Hi I have a chamberlin lift master Professional formula 1 garage door opener and the lights use to time out but now they stay on.


The relay that controls the lights is most likely bad. This is a unfortunately a common problem after electrical storms.

Sep 27, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opens about 8 inches and then revereses


Formula what? they have over forty different types. though sounds something like either limit switches may be faulty. Is this door new? Are there any odd noises from the motor?

Mar 21, 2009 | liftmaster Chamberlain Garage Door Opener...

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