Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

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We have no problem with the liftmaster model 3280 until now. About couple of weeks ago, when we open our garage door, the light would turn on for a few minutes then shut off. Well, this time, the light did not turn on. And so I thought by just replacing the light bulbs problems will be solved. Unfortunately, after replacing the new light bulbs, the light still did not turn on when we open our garage. We do not hear the sensor click on. In addition, the safety reversing sensor on the left side of the garage is green. However, the sensor on the right in yellow. Could you help?

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  • Jim Geuin
    Jim Geuin Dec 06, 2013

    Same issue . . . relay clicks but light does not come on. After a several minute delay, breaking the light beam or operating the door closer the light will come on momentarily, then go off.

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5 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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Just_Bobz
  • 448 Answers

SOURCE: Safety sensors

Pull the contact wires off the back of the eyes. If this is found helpful, please post as such. Post as fixya if it gets the desired effect. TY

Posted on Jan 16, 2009

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  • 25 Answers

SOURCE: My garage door opener stoped working after a storm.

there is a 2amp fuse inside the opener. go get one and replace it. please look at what kind of fuse it is it's the one that has glass all around and about 1 inch long. to replace this unplug the unit then take the 4 screws out take cover off and you will see the fuse inside

Posted on Jun 20, 2009

  • 52 Answers

SOURCE: Liftmaster 1/2 HP Garage Door opener won't open or Close

The shaft on these garage door motors are not direct drive systems. You'll have to open up the box to see what the actual problem is. I have had stuff like this happen where a gear just slipped out of place.

http://www.aaadooropeners.com/?gclid=CLH3wt628p8CFVZS2goduwSLYQ

Here is a link for a parts supplier. I don't know your model but it looks like most of the Liftmaster worm screw gears and drive gears are plastic so it's possible that one of them has cracked.

Posted on Feb 14, 2010

swolfinor
  • 504 Answers

SOURCE: I have a liftmaster garage door that doesn't work.

YOU COULD TRY

RECONNECT THE RPM SENSOR, UNPLUG THE UNIT. TURN THE MOTOR BY HAND (DOWN DIRRECTION) TO CLEAR THE LIMIT SWITCH.

PLUG THE UNIT IN IF. IT STILL OVERSHOOTS THE LIMIT IT COULD BE A BAD LIMIT SWITCH. IF THE SWITCH TESTS GOOD FOR CONTINUITY REPLACE THE BOARD.

HOPE THIS HELPS

Posted on Jun 05, 2010

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My garage door opener stoped working after a storm.


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