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Access Master M100 Garage Door Opener has quit completely - what does the 5X flashing yellow lights mean?

5 flashes means "Opener overheated/bad rpm sensor
". Let the opener cool down for 30min. Then try again. If that does not help then replace the rpm sensor. If that still does not help then have a garage door pro come out to have a look.

Jun 06, 2012 | Sears LiftMaster Home Security

1 Answer

Liftmaster Chamberlain Garage Door Opener Transmitter 300MC: Light keeps on flashing on the motor...

how many flashes
1-safety sensor wire broken
2-safety senor wire shorted or reversed
3-door control or wire short
4-safety sensors mis aligned
5-motor overheated or bad RPM sensor
6-circut failure, bad logic board

May 17, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

My craftsman door opener went up half way and stopped. Light on u nit was not on and indicator light flashed 5 times, the repeats 5 flashes. billybob

The code for that light flashing 5 times is 'motor overheated or RPM sensor failure'. The RPM sensor is a small printed circuit board just in front of the motor. Release the door from the opener and operate by hand. It should raise easily and should stay put when it is about waist high.

Dec 26, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a liftmaster 102-1499A 03/2006 and yesterday it stopped working.. it attempts to move but does not, then motor humms and light flashes 5 times.. i've removed the chain, looked at the gears.. all...

The code for the LED flashing 5 times is " Motor overheated or possible RPM sensor failure. Unplug to reset".
The RPM sensor is a small printed circuit just in front of the motor.

If the flashing is the main light and it is flashing 10 times then it is a door sensor problem. Make sure the are pointed at one another.

Nov 22, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door will not open

The light flashing 5 times is the code for RPM sensor or motor overload. The RPM sensor is a small printed circuit board just in front of the motor. I would really doubt it is a motor problem unless you have been operating the opener enough that the thermal overload protector has shut it down. It will start running again as soon as it's cooled off.

May 20, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

5 blinking lights

The code for 5 flashes is RPM sensor or motor overload. Did you remember to put the black plastic interrupter cup on the end of the motor shaft? Also check the small quick disconnect on the RPM sensor printed circuit board. Make sure it is connected securely.

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

1 Answer

Craftsman 1/2 horsepower not working

Five flashes indicates possible RPM sensor failure. First try unplugging opener for five minutes and plug back in. If it still does not work replace RPM sensor.

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

1 Answer

Chamberlain door will not close, despite down force set to max

Problem solved, sort of-
My unit has self diagnostic capabilities: next to the remote sync red button, is a yellow light the indicates diagnostic readings by blinking. In my case the light was flashing 5 times after the door failed to close. This meant RPM sensor failure. I rechecked the sensor and "flywheel" cap and found that it was not completely secured. With the "flywheel" in the proper position, providing readings for the RPM sensor, the door completely closed.
But my yellow diagnostic light is still flashing 5 times. My door is operating correctly, but the diagnostic feedback is still not completely happy with my RPM sensor. So I will keep and eye on it.

Oct 11, 2008 | Chamberlain Powerdrive PD422D 1/2 HP...

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