Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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I have a lift master and it will not open from any control lite comes on but no sound from motor greenled appears to flash 5 times unplugged and reestablish power with no results

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The code for 5 flashes is RPM sensor or motor overload. The RPM sensor is a small printed circuit board just in front of the motor.

Posted on Sep 01, 2010

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Posted on Jan 02, 2017

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How to change code on the garage door opener and the remote control on a lift master garage door opener


If you have a 315MHZ LiftMaster Garage door opener do the following:
Follow the purple wire (Antenna) up and you will see a square purple button.
Press and hold the square purple button for ten seconds until the amber led goes out.
Press and release the purple button one time (The amber led will come on solid).
Press and hold the button on the garage door opener remote control for two seconds (The light bulb on the garage door opener will blink and you will hear a click sound the amber led will go off).
to program the wireless keypad do the following:
Press and release the purple button one time (The amber led will come on solid).
Enter a four digit code into the keypad then press and hold the enter button for two seconds (The light bulb on the garage door opener will blink and you will hear a click sound the amber led will go off).

Aug 08, 2014 | liftmaster Lift Master 377LM 376LM 315 MHz...

1 Answer

I have a Chamberlane Lift Master Professional I went to open it yesterday and it would not open. When the button is pushed the unit just clicks and the controller light is blinking 5 times then pauses and...


The code it is flashing is "RPM sensor or motor overload." It is not a door sensor problem. The RPM sensor is a small circuit board just in front of the motor.

Mar 25, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a Liftmaster Model 2500 opener. It is about seven years old, and worked great until recently. It has stopped working, including no lights at the Multi-function door control. If I unplug the...


THIS IS PROBABLY CAUSED BY A SHORTED WIRE.

OR A BAD WALL CONTROL.
DISCONNECT WALL CONTROL & TEST.

IF STILL NO RESULT DISCONNECT WALL CONTROL WIRES AT THE POWERHEAD & TEST AGAIN.

REPLACE WIRE OR WALL CONTROL.

HOPE THIS HELPS

Nov 15, 2010 | liftmaster Chamberlain Garage Door Opener...

2 Answers

Lift-master 2000SDR remotes will open but not close garage door. Same problem with all clickers and even those programmed into the cars. What could this be and better yet, how do I fix it?


Lift-Master 2000SDR opener. Opener generally works fine from the remotes. However, first time in the morning in cooler weather, it will start to close and the reverse and the lights blink. I have checked the senors - appear to be aligned properly. I have lubed the gear and used garage door spray on the rollers and hinges at the proper places. To close the door when this happens, I have to hold the wall button.

Nov 25, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a Lift Master 1/2 HP Prof. line and remote will not open door but from inside on wall it will if you hold the button for about 5 seconds and then hit the button again it will open door. There is a...


If you have the 3 button wall control you need to press and hold the button with the lock icon for 3 seconds.

You may also need to new wall control. You shouldn't have to hold that button in nor press a second time.

Nov 04, 2009 | Sears Craftsman LiftMaster Chamberlain...

3 Answers

Lift-Master garage door opener stopped working


The motor will probably need rewinding.
Professional job. Don't forget to take the condensor with the motor.
Or alternatively, if money isn't a problem,, get somebody out to look at it.
There ya go:)

Jul 27, 2009 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Xantrex 2412 will not open my Chamberlain Lift Master Prof. door


That must be a pretty big door opener. Problem is probably the motor's starting current draw. Most AC induction motors pull 5 to 7 times their rated running current when starting from a dead stop. (about 7,820 watts) That's much more than the surge capacity of a 2.4 Kw inverter. Sounds like you need a bigger inverter or a smaller door motor.

Jun 06, 2009 | Xantrex Technology Trace Series Inverter /...

1 Answer

When I push open or close the unit starts but stops the yellow light on rear of unit blinks 4 times then a short pause and blinks 4 times again and continues to do this



# of flashes

1

2

3

4

5

6

Rapid Flashing





Problem

The Protector System wire open or totally misaligned

The Protector System wire shorted or black/white wire reversal

Door Control or Multi-Function control Panel wire shorted

IR sensor slightly misaligned (dim or flashing sensor LED)

Motor overheated/Possible RPM sensor failure -- unplug to reset

Motor circuit failure -- replace RX/LX board

Liftmaster transmitter with the correct format code being received
(opener not necessarily programmed to respond)

Mar 28, 2009 | liftmaster Chamberlain Garage Door Opener...

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