Hi David,
I agree with Trevor,
Try increasing the down force adjustment. Cold weather may have made the
door closing kind of stiff. A little lube on things may help also. There
are a couple of adjustments on the motor box as Trevor says.
Dave Russell
Trevor Boicey wrote:
>
> David Scheidt wrote:
>
>> One of our garage door openers started mis-behaving yesterday. It
>> goes up and down fine, if the door isn't attached to drive
>> mechanism. With the door attached, it opens. When it tries to
>> close the door, it goes about a foot, stops, reverses, and flashes
>> the light; the same behavior as if something had tripped the safety
>> photo-eyes. It's a Craftsman chain driven opener.
>>
>> About all I know about these things is how to push the button, so I
>> have no idea where to start looking.
>
>
> Usually on the unit there are two force adjusters, one for up and one
> for down.
>
> One adjusts how hard the unit will try to go down before it
> safety-reverses, the other up.
>
> Try giving the down one a little increase so it tries a little harder
> before giving up.
>
> Because of your "no door attached" test, the photoeyes are probably
> still aligned. But since they usually have LEDs to show alignment,
> check and see if they are on, and wave your toe in front of the line
> and see if they go off.
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