I second the beam issue. I've had occasions before where the beam was
barely aligned, but the action of the door starting must have shook it
or flexed it off. I'd watch the lights on the beam receiver as the
door is operated and see what happens, or I'd go ahead and clean and
re-align the beam, making sure it's centered.
Jeff Scarbrough
Corrosion Acres, Ga.
On Mon, Sep 15, 2014 at 10:18 AM, Steven Trovato <strovato@optonline.net> wrote:
> All the advice about lubricating rollers and checking for binding is all
> good and worthwhile to do. However, with my Chamberlain openers, when the
> light blinks and it refuses to close, it means the safety beam system is
> detecting an obstruction. It could be a beam alignment issue, it could be
> dirt or something on the lens. It could be a fault in the circuit board.
> In my experience, though, it is never related to the door binding. On my
> openers the door may reverse because of binding, but this does not cause
> the light to blink. The fact that the problem went away for a week when
> the service guy came leads me to believe that it is not a fault in the
> board. It is more likely to be a beam alignment or cleaning issue.
>
> -Steve Trovato
> strovato@optonline.net
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