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Posted by tomh on February 20th, 2003 10:56 AM
In reply to safety device by Janice on February 20th, 2003 08:57 AM [Go to top of thread]

The door will return if it is slightly out of adjustment (tries to close too far). There are several different ways this adjustment is made depending on the brand of opener. Some use a mechanical switch along the chain rail to detect opening and closing, others have adjustments on the motor housing. Your door is either attempting to close too far (most likely), or the safety adjustment is set too light (not as likely because door returns at end of closing cycle).

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