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

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Merlin 230t My merlin 230T garage door slams closed and opens again automatically. I've tried adjusting the travel but can't seem to find the sweet spot. It either stops short or slams again. I've noticed the drive chain has become quite loose- more than what would occur through normal wear and tear I think. Could it possibly have slipped of an internal cog?

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richie46

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If the chain is loose I would definitely tighten it up to remove the sloppiness of the drive. That will in turn help you to accurately find the sweet spot that is currently eluding you. And you have to work fast because you do not want to overheat the motor.

Posted on Sep 21, 2017

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Anonymous

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SOURCE: My merlin 230T won't open or closes with remotes

Unlock the LOCK

Posted on Jul 11, 2010

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Don Maggard

  • 3197 Answers

SOURCE: I have a Merlin 230T garage door opener which

There is no fuse in the unit. Check your house circuit breakers and if you have had electrical storms or surges you might pull the logic board and check for burnt or missing traces on the printed circuit board.

Posted on Sep 22, 2010

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Hey I want to know where the learn button is on merlin 230t garage door motor thanks


Press and release the green operate button to move the
door up or down. Press again to stop in the required fully
open or fully closed positions. Each time the operate button is pressed the door will stop or move in the opposite
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Feb 11, 2017 | Building Materials

1 Answer

The light stays on


guessing it is a sensor issue. the safety sensors

Aug 23, 2015 | Building Materials

1 Answer

I have a Merlin 230T garage door opener and it has started to run in the opposite direction. ie; it is closed now and when I use the remote control it tries to close more


Pull the emergency release handle. Use remote to open door then close it again with the remote. Now re engage the emergency release. That should put the chain in the right position for proper operation.

Aug 28, 2014 | Building Materials

1 Answer

Merlin 230t Door completes closing and goes straight back up again without using the remote...all adjustments have been made by a licenced door mechanic and yet it still refuses to stay down


Check for black marks on the wall or something it may be hitting . (if so the track is to tight to the wall)..... also Release the door from the opener and check it manually make sure its smooth and balanced correctly two panels up two panels down

May 26, 2014 | Building Materials

1 Answer

The garage door will open and then close then open and then the light starts to flash it's a Merlin 230t


This just happened to me. The issue was that the chain that the motor moves back and forth to open/close the door needed to be tightened as the tension had become slack, so the door was hitting the ground hard when it closed and the system automatically raised the door. I closed the door by adjusting the downward travel and then tightened the chain tension by twisting the bit at the of the chain (you'll see it and can use your fingers to do this), once done, then it was a matter of adjusting the upward and downward travel knobs and testing the door to make sure the door was back to normal.

Jul 27, 2012 | Home Security

3 Answers

I have a Merlin 230T garage door opener which abruptly stopped working altogether. Could it be the fuse?--or any other suggestions.


There is a fuse in a Model M-230T and I have seen a service man change it.Now that the fuse has blown again, I want to change it myself BUT can't now find it!

Can anyone please offer a guide to changing the fuse?

Sep 22, 2010 | Sears Craftsman LiftMaster Chamberlain...

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