"Harry Bloomfield" wrote in message
...
on 06/06/2019, Davidm supposed :
Out of curiosity - what happens if you're not in the garage, the power
fails with the door closed, and you have no other entrance into the
garage?

If the door roll is on the inside, they offer a linkage down and through
an access hole for a manual winder. If the roll is mounted outside, or
there is alternate access, you can just hook an handle on to the end of
the drive for the roll.

you have to unscrew a corner of the external roller cover on mine...