Door will not stay closed

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  #1  
Old 05-22-17, 08:02 AM
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Door will not stay closed

I have a Liftmaster 8165. Up until recently it worked fine but now it won't stay closed (day or night) unless I hold the wall switch down. I reset the door as per the instructions but that didn't help. The door will close to about an inch off the ground and then go up again. I don't see any rubbing on the tracks. I'll probaby have to call service but I thought maybe I would get some help here first.

Thanks.
 
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Old 05-22-17, 06:30 PM
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Have you adjusted the down pressure at the head?
 
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Old 05-23-17, 03:25 AM
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If it's not the eye sensors reversing the door then you probably need to reset the up and down force. This ids done automaticly after setting the travel limits. Go here and follow the steps to set the travel.http://www.liftmaster.com/catalogres...ments%7C_____2
 
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Old 05-23-17, 05:47 AM
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Doorman: I already adjusted the force more than once without success.

Chandler: Can you say more about adjusting the head. I don't know what that refers to.

Thanks to both of you.
 
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Old 05-23-17, 02:28 PM
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No, it is doing the adjustment like Doorman says, "at the head". Do you have limit switches at either end? Are they adjusted properly?
 
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Old 05-23-17, 03:59 PM
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Alright lets start over... you state your door is going down to within 1 inch of the floor and then reverses. Is this while you are holding the wall button? Or not holding the wall button?
 
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Old 05-24-17, 07:25 AM
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Not holding the button. I can close it all of the way when I do hold the butoon.
 
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Old 05-24-17, 03:52 PM
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And when the door reverses and goes all the way back up... Are the light bulbs or bulb, (depending on how many your opener has) flashing approx. 10 times? If your opener does not have regular light bulbs or they are burned out put new ones in.... If you don't have usable light bulbs installed in your door opener, all you will here is a clicking sound about 10 times. Is that happening? Light bulbs flashing with a clicking sound?
 
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Old 05-25-17, 07:27 AM
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Yes. When it goes back up the light blinks 10 times.
 
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Old 05-26-17, 03:22 AM
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Then this is simple, your problem is an eye sensor problem... either something is blocking it, they are misaligned or as the door gets almost closed there is movement or vibration causing misalignment. make sure they are clean, pointed at each other and secure and nothing on the door it's self obstructing the eyes.
 
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Old 05-26-17, 05:46 AM
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In south Florida garage doors have 2x4 horizontal beams adding support to the door. One of the beams were blocking the sensors as the door came down. I lowered the sensors and all is good.

Thanks very much for all of your help!
 
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