1. Computer problem? Tech Support Guy is completely free -- paid for by advertisers and donations. Click here to join today! If you're new to Tech Support Guy, we highly recommend that you visit our Guide for New Members.

Solved: Door closes and reverses - adjustments unsuccessful

Discussion in 'Do It Yourself (Not Computer-Related)' started by fdm2000, Jul 20, 2012.

Thread Status:
Not open for further replies.
Advertisement
  1. fdm2000

    fdm2000 Thread Starter

    Joined:
    Jul 10, 2005
    Messages:
    5
    I have a Craftsman 1/2 hp garage door opener and just had the cables replaced and the door worked perfectly. Today I have a problem;

    The door closes to the correct position but immediately reverses and the trolley rides all the way to the stop bolt and hits it with extreme force.

    I have decreased the down travel (turned the down screw clockwise) to correct a door that reverses upon closing as the manual suggests and no matter how much I turn the down adjustment screw it seems to have no effect. Could this be a defective adjustment component? Would this also explain why the trolley is riding so far that it slams into the stop bolt

    There is nothing binding or interfering with the door or sensor. And the sensors are aligned

    Any suggestions would be appreciated.


    Frank
     
  2. wowzer

    wowzer

    Joined:
    Dec 28, 2009
    Messages:
    1,598
    Are the two trip switchs still in place on the trolley?

    The sensor are there only to reverse the door when coming down if the beam is interupted.
     
  3. fdm2000

    fdm2000 Thread Starter

    Joined:
    Jul 10, 2005
    Messages:
    5
    Thanks for the response, wowzer. I removed the motor cover and discovered that the gray wire to the center limit contact was somehow cut in half. I have no clue how this could have happened, I restored the connection and adjusted the up and down screws and hopefully it will continue to function - otherwise I may have to purchase a new limit switch assembly.

    The nylon gears appear to be in good working condition and undamaged so I will just buy some lithium grease and lub them.

    Frank
     
  4. wowzer

    wowzer

    Joined:
    Dec 28, 2009
    Messages:
    1,598
    Hopefully that will solve your problem...
     
As Seen On
As Seen On...

Welcome to Tech Support Guy!

Are you looking for the solution to your computer problem? Join our site today to ask your question. This site is completely free -- paid for by advertisers and donations.

If you're not already familiar with forums, watch our Welcome Guide to get started.

Join over 733,556 other people just like you!

Loading...
Thread Status:
Not open for further replies.

Short URL to this thread: https://techguy.org/1061917