Call 650-912-1817 to describe the problem and confirm current availability.
Signs of a cable issue
You may see a cable hanging loose, fraying near a drum or bracket, one side of the door sitting lower, or the door moving at an angle.
Cable problems can involve spring tension
Because cables are part of the counterbalance system, replacing or repositioning them can involve stored spring tension. Avoid removing bottom brackets or cable hardware yourself.
Inspection matters
A cable failure can be the result of another component problem, so the technician should inspect related drums, springs, rollers and brackets rather than treating the cable in isolation.