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"humms" but won't open or close

Posted by john connell on February 25th, 2003 02:04 PM
In reply to Garage Door Opening Problems by KW in New Mexico on December 11th, 2002 09:20 AM [Go to top of thread]

Push button on remote or wall and opener "HUMMS" but just sits there.
Track Lock for securing door to opener slides back and forth down lenghth of rails, and the chain that locks onto Track Lock moves freely inside track rails.
But when you add power motor just "HUMMS". Question is "How do you replace sprocket on Motor"?

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