Matty F wrote:
On Mar 30, 1:07 am, Nozza wrote:

Now I can't close the garage door. It gets nearly to the floor - about
15 cms away - and is sticking out a little bit. Have tried pushing it
back up and trying again. Noticed theres a bit of dangly wire on the
left side, and the wire on the right is taught and now theres none on
the "rolly bit" at the top.

Such doors can be very dangerous if you undo the wrong bolt. It's not
a job for the average DIYer. I hope you are going to post something so
that we know you still have some usable arms!

I do recommend an electric motor to open them. You'll need another
door to get in in case there is a power cut.

Many years ago I motorised an old up and over door with a kit from
Wickes. The original door had runners and as soon as the motor pushed
the door to open it the door lurched down the runners very suddenly.

The remote control was poorly designed and difficult to hold without
setting off the door by accident.
The safety beams to make sure there was nobody in the way when the door
closed were additional extras available by post.

Inevitably one morning whilst putting my briefcase in the back of my car
I accidentally set the door in motion and ended up on the floor, stunned
and with a bleeding head. Lesson learned I thought until I realised the
agony I was suffering from my back on the M25 that evening was down to
this incident.

Some months and a medical report later Wickes insurers coughed up enough
for a rather good foreign holiday. On balance though I would rather have
not had the pain than had the holiday.

I do agree that spring counterbalanced garage doors should be approached
with considerable care. There is a LOT of tension waiting for something
to bite or hit.