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Liftmaster Garage Door Opener Problem

Hello Door Tech: Can you go to the Sears Garage Door Opener Form and see if you can diagnose the problem I am having? The post is about the opener only humming when you try to use it I added a post to someone else's post. Thanks, John PS: I could not find Garage Door Openers in the Product Categories.

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  • downundertek Jan 11, 2009

    Thanks for the advice on replacing the capacitor even though this did not fix my problem. I removed the GDO motor & head assembly and took it to my local GDO service center and the technician quickly found the circuit board was burnt out. There was a portion of the board that was dark brown (burned area) compared to the rest of it. It was a very old GDO unit (unknown age) so I purchased a new unit and I installed it yesterday. The new one has the safety reversing sensors at the bottom of the door which I am glad to have. Thanks for your help.


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The Capacitor is a 53-64 MFD 220 VAC. A bad capacitor will cause what you are experiencing.

Posted on Jan 09, 2009

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