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My 1/2 hp craftsman door opener has been working fine. Today it won't stay closed. There is nothing in front of the sensor. The door goes all the way down, hesitates and goes right back up.

I've tried adjusting the travel up and down screws to no avail. The opener is about 18 years old. Any suggestions?

Posted by Anonymous on

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  • 73 Answers

Although nothing is in the way of the break-beam sensors, are they still properly aligned? They usually have a light on them to indicate if alignment is still correct.

It could be a limiter switch, Although you have adjusted your travel screws maybe the sensor for the downward travel screw is failing?

Posted on Jan 25, 2019

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6ya staff

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Posted on Jan 02, 2017

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Anonymous

  • 1 Answer

SOURCE: door opens and then closes wright away

I figured out that when I replaced the gears, I damaged the RPM sensor. It was easy to swap out the old for the new and now it works fine.

Posted on Feb 28, 2009

Anonymous

  • 2 Answers

SOURCE: Craftsman 1/2hp garage door opener does not go down to floor

I'm no expert, but on a previous door opener I had (don't know the brand), the side adjusting screw basically adjusted a limit switch, which was located inside the plastic housing (where the motor is). I was able to remove the housing, figure out which limit switch was actually being contacted "too soon" on the way down and adjusted it while watching it.

Just a suggestion, you might take a look.

just keep your hands out of the way of the chain and sprocket if you do take the housing off. .

Posted on Mar 03, 2009

ltfrc

Mike Schmidt

  • 227 Answers

SOURCE: New Craftsman 95320 1/2 hp chain drive only opens door ~6"

Try this link
http://www.garagedooropeners.us/helpgifs/chamberlain_troubleshooting.html

Posted on May 25, 2009

Anonymous

  • 22 Answers

SOURCE: my craftsman 1/2 hp garage door starts to close and then opens up

I had a simular issue, except mine was that the previous owner decided to mess with all the settings and mounts and screwed everything up.

The problem isn't your force sensors its your downwards stopping sensor on the opposite side of the opener. For me I had to take the entire panel off and replace the sensor back in its holder, but try adjusting that sensor setting (clockwise goes down, counterclockwise goes up).

If that doesn't work then i dunno:)

Also set both force settings in between 0-1, for some reason with mine if i set it higher it would set them off....

Posted on Jul 19, 2009

Don Maggard

  • 3197 Answers

SOURCE: garage door opener won't close. travels 6-8 in.,

If you cannot get the light on the sensor to come on by tweaking it,making sure it is pointed at the other sensor and your wiring is not broken or shorted then your sensors need to be replaced.

Posted on Jan 08, 2010

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Nothing wrong with the sensors and they only work when the door is closing anyway. Sounds like you may have a broken door spring or a bad drive gear. The drive gear is white nylon and is in front of the motor. It will be obvious if it is going bad.

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If the main light flashes 10 times when the door reverses to the open position it is a door sensor problem. Make sure both lights on the sensors stay on and don't flicker while the door is moving and the sensors are firmly attached so they don't move. Tweak them just a bit.

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Remove the cover and check the drive gear. It is white nylon and is just in front of the motor. It may be stripped. Take a close look at those door springs. They can sometime appear to be okay when one is broken.

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My craftsman 1/2 hp garage door starts to close and then opens up


I had a simular issue, except mine was that the previous owner decided to mess with all the settings and mounts and screwed everything up.

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If that doesn't work then i dunno:)

Also set both force settings in between 0-1, for some reason with mine if i set it higher it would set them off....

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