Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

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Garage door opener will not respond to security plus remotes

Door opened and closed fine in the am; in evening when attempted to open the door using remotes it would not open, would open with hard wired control; would close using hardwired control but not remote; changed batteries, no effect; attempted to reprogram remotes using smart button, remotes would not reprogram; went online to check faq for suggestions - the two offered were change batteries in remotes and reprogram; NEED HELP

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Reset the Liftmaster unit. There should be a red reset button on the unit in the garage. If this does not work, reset the breaker. Good Luck!

Posted on Jul 22, 2009

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Posted on Jan 02, 2017

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1 Answer

My garage door will only open half way. It appears to be getting stuck when it is opening.


If you haven't gotten your issue fixed yet... I had the same problem (stopped opening half way when using the remote, went down fine, could lift/close manually fine as well) and this happened on our first cold weather day of the year which was very telling. Anyhow, there are two gauges/dials on your garage door opener unit itself (above, where the light is) which controls how much torque/strength your door uses to open or shut through resistance. I turned mine up some and it now works fine; what likely happened was that the metal tracks or the wood frame condensed in the cold and was providing just enough resistance to stop it when opening - as they have a security device built in to stop if they meet any resistance. Hopefully this helps!

Oct 27, 2012 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door won't open or close using remote (light on lifter flashes twice) but will open and close using the button inside the garage.



WHEN HOLDING IT DOWN MAKES THE DOOR CLOSE PROPERLY THE PROBLEM IS IN THE SAFETY EYES.


ARE BOTH LEDS ON? - CHECK FOR A LOOSE OR BROKEN WIRE.

ARE THE EYES WIRED CORRECTLY?

ARE THEY AIMED AT EACH HOLDING DOWN THE WALL BUTTON OVERRIDES THE SAFETY EYES.

OTHER?

Oct 10, 2010 | Chamberlain Powerdrive PD422D 1/2 HP...

1 Answer

My Craftsman remote won't close my garage door


If the remote opens and closes while inside the garage but not outside , there are a few things it could be. Assuming it was working fine before..
1. weak battery in remote.
2. remote itself could be bad. (unless you have more than 1 remote acting the same)
3. Logic board in opener is going bad causing limited range.Is the wire that hangs down from the opener straightened out? That is your remote antenna.Some people have coiled or even cut it off..reducing range.
4. Less likely but this can happen- interference from another electronic device, wireless routers, cell phone, new appliances etc.. can reduce remote range. Any new electronics recently purchased?

Jan 28, 2010 | Sears Craftsman LiftMaster Chamberlain...

3 Answers

Sears garage door opener 1/2 hp about 6 years old. Will not respond to remotes to open and close. Light flashes on opener when remote is pressed but no door action.


Door sensors are not working. Check if lights are on both sides.
Might be misaligned or one is bad.
Door will close if you hold in the garge close button until it's all the way down.
And it will open on it's own.
You can get these off ebay.

Jan 15, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Poor remote control range


have you changed the battery inside the remote yet?

Apr 26, 2017 | Chamberlain Powerdrive PD422D 1/2 HP...

1 Answer

Garage Master 1/3 HP 1997 Door Working, not responding to Remote


I have the exact same situation, except my model (139.53607) is older than yours and does not even have an LED. Remotes only works after after shop light goes off (5 minutes or so), but wall button works fine. Did call Sears Service and the tech told me the logic board is probably shot. Don't want to waste money on service call so I'll probably have to buy a completely new unit in the Spring and go through the winter without the use of a remote.

Jan 24, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

The garage door works when it wants to.


You have a problem with the safety eyes. Make sure a light is on on both eyes. If not, realign until both lights come on.

Jan 21, 2009 | Chamberlain Powerdrive PD422D 1/2 HP...

1 Answer

Garage door opener does not work


My Garage door goes down half the first time I'm attempting to close it; then closes completely the second try. What's the problem?

Jul 18, 2008 | Chamberlain Powerdrive PD422D 1/2 HP...

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