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Old 11-21-2011, 02:58 PM   #1
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garage door opener problems


i have an 18 year old quarter horsepower sears craftsman chain driven garage door opener lifting a single width door. the door opens fine. recently the door has not been going down . it will go part way down then return to fully open. i have greased and tightened the chains and rails. and have attempted to adjust the up and down force screws in many different combinations with no luck. i have another door with the identical set up which works fine and have even tried switching the springs from that good door to the bad one with no change.when i release the door from the opener and manually raise and lower the door it seems to move fine. the safety sensors at the bottom of the door seem to be ok as i dont see them flash when the door returns to open,any ideas? if i have to buy a new opener and install it i have no problem with that,,,,maybe its had its time. thanks paul

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Old 11-21-2011, 04:19 PM   #2
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Could the sensors just need cleaned? Maybe some sawdust and other usual garage dirt may have messed with them. Or maybe the sensors just need replaced.

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Old 11-21-2011, 04:31 PM   #3
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the sensors due not appear to be failing, the solid green light is on both sensors, if i pass my hand in front of the beam the light goes off as it should.. when the doors stops in mid flight on the way down the sensor leds stay solid like nothing is passing in front of them,,, could they still be failing if the leds arent going off in mid travel?
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Old 11-22-2011, 06:42 AM   #4
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garage door opener problems


Check door operation manually with the opener disconnected. It should go up/down easily with not binds/catches. You should be able to stop the door mid travel and it will stay when you let go. If that all works, you need a slight adjustment to down force.
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Old 11-22-2011, 07:01 AM   #5
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the sensors due not appear to be failing, the solid green light is on both sensors, if i pass my hand in front of the beam the light goes off as it should.. when the doors stops in mid flight on the way down the sensor leds stay solid like nothing is passing in front of them,,, could they still be failing if the leds arent going off in mid travel?
I'd try switching sensors with the other door. Just because the LED's stay on, doesn't mean it necessarily rules them out as the problem.
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Old 11-22-2011, 10:58 AM   #6
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when i operate the door manually it will go down no matter what position i start it in, i can raise and lower it smoothly but it wont stay in any one position,,,are the springs weak?
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Old 11-22-2011, 02:32 PM   #7
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when i operate the door manually it will go down no matter what position i start it in, i can raise and lower it smoothly but it wont stay in any one position,,,are the springs weak?
They could be just be adjusted incorrectly. It's the springs that actually do the work in raising and lowering the door. The opener just guides it. It puts more stress on the opener if the springs are either incorrectly adjusted or the wrong size altogether.
This won't effect your other stopping issue.
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Old 11-22-2011, 06:01 PM   #8
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if the springs are not adjusted properly can i do the adjusting and if so how is it done? i know and respect the power in the springs and would only attempt something when the door is up and there is slack in the springs....and then stand back.
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Old 11-22-2011, 08:02 PM   #9
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Paul,
Do yourself a favor and go get a new opener. If you got 18 years out of a 1/4hp sears (liftmaster), you did good. The new ones don't usually last that long. I replace a lot of sears openers that are under 10 years old. Liftmaster still makes them, but to Sears' specs. If you aren't versed on garage door repairs, best to find a local independent garage door repairman. It's a simple job for him to check and adjust your door to make sure its working properly and also can check your opener while he's there.
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Old 11-23-2011, 07:54 PM   #10
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If you already got 18 years of service from that old garage opener, consider yourself very lucky. I think it's time for a new one.
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Old 11-23-2011, 10:17 PM   #11
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sorry i started a new post asking about a belt drive (quieter) unit which i am gonna go with,, you are right i am blessed getting that much use outta that opener and i cant believe how fast time flies

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