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

1 Answer

Craftsman 1/2HP VERY Erratic Works then won't

I have this on going problem with my Craftsman 1/2 HP opener. Sometimes it works fine but MOST of the time it stops going up OR doing down. I have tried ALL the adjustments in the manual but the problem to me seem to be coming from where the sensor wires push into the connectors on the head. They just don't seem to hold tight, if you pull on the wire they will come out. Is this a common problem ?? Why didn't they use screws to hold the wires on, this push in connector STINKS. Is there a fix. I am ready to pull the unit out and buy a Genie. I had a Genie for 25 years with NO problems. Can you help??

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  • 7 more comments 
  • Ralph Esposito Mar 09, 2009

    Thanks for the reply, I did try that, was real hard to get in and could not get them to lock good when doubled. I even tried wrapping the two same wires together and putting them in the same hole. Both worked for a day or so then started up acting weird again. Really has me stumped. Just can't seem to get a GOOD positive grip on the wires in the push in holder.

  • Ralph Esposito Mar 09, 2009

    OK. 2 hours ago I when out and made SURE the wires were in the connector tightly, I opened and closed the door at least 10-12 times NO PROBLEM. Now JUST went out there and tried it again opened up about 3" and stopped, pushed the button again closed then opened again 3-4" !!! I give up !!!!! Is there anyway to by-pass the sensors just to see if they are causing the problem ???

  • Ralph Esposito Mar 09, 2009

    That sounds like what I may have to do, sorry to say. Are they hard to take apart ? I'm good at fixing thinks like this but did not want to take it apart, but looks like the only thing left.

  • Ralph Esposito Mar 09, 2009

    "Maybe the door itself is in a bind?



    Check all the bolts to make sure they are tight, the springs (if any)
    are adjusted properly and that the little guide wheels aren't binding
    up in their tracks."

    Checked all that first thing, beside sometimes it works fine like 2 hours ago .


  • Ralph Esposito Mar 09, 2009

    "Maybe the door itself is in a bind?



    Check all the bolts to make sure they are tight, the springs (if any)
    are adjusted properly and that the little guide wheels aren't binding
    up in their tracks."

    Checked all that first thing, beside sometimes it works fine like 2 hours ago .


  • Ralph Esposito Mar 09, 2009

    Any way to put a jumper wire at the connector to by-pass the sensors ?

  • Ralph Esposito Mar 09, 2009

    OK, I THINK I have it fixed, time will tell. I was going to solder the wires on the board and when i took the board out the end cap on the part that the wires plug into was loose and fell off, the end wire was the one always not holding good. I glued it back on and the wires seem to now hold good, still don't like the set up rather have screws. Also adjusted my up force which seemed to help with the only 3" lift and ran it I bunch of times with no problem. Will see how it goes, acts up again in it goes in the trash!!
    Thanks for the help.


  • Ralph Esposito Mar 09, 2009

    That's what I thought the last 10 times I worked on it :(
    I got my fingers crossed this time, hope it stays working :)
    Thanks


  • Ralph Esposito Mar 14, 2009

    Just an up date, I finally fixed the problem. Had to solder
    the sensor, and wall control wires to the circuit board. Wires were not making
    good contact in the push in connector no matter what I did.

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  • Master
  • 463 Answers

Strip a little more of the wire out on the end, double it over and gently twist, making the apparent bare end of the wire 'bigger'. Then, stuff it back in the push connector.

This will make the diameter of the wire a little larger, and also a little "bumpy", giving the friction connector a little more something to hang onto.

Posted on Mar 09, 2009

  • 1 more comment 
  • Rob
    Rob Mar 09, 2009

    Take the unit apart and solder them in there...

  • Rob
    Rob Mar 09, 2009

    Maybe the door itself is in a bind?



    Check all the bolts to make sure they are tight, the springs (if any) are adjusted properly and that the little guide wheels aren't binding up in their tracks.

  • Rob
    Rob Mar 09, 2009

    Man, come on! Have more confidence in yourself. That was obviously what was wrong... and YOU fixed it. Good job!!!

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