Chamberlain code 4-6
The door won’t close because the sensors can’t see each other
You can check thisThe two safety sensors are out of line, or something blocked the beam between them for a moment.
What to do: Line the sensors up until both of their lights glow steady, without flickering. Move anything that hangs in the doorway or sits on the door in the beam’s path.
From the maker’s manuals:
- Chamberlain manual, PDF page 40 for B980
- Chamberlain manual, PDF page 43 for the B4603T and 4 more models
Which models each manual covers
- Chamberlain manual for model B980
- Chamberlain manual for models B4603T, B4643T, B4613T, B6713T, B6753T
Not this one? Look up another Chamberlain code
Garage Door Science isn’t affiliated with the opener makers LiftMaster, Chamberlain or Genie. Each meaning is our summary of the maker’s own manual, which we link.
Find a local pro in your area
Broken spring, door off the track, anything urgent? Enter your ZIP and we’ll hand you off to the installer we’d call ourselves.
We match you by ZIP code to a local garage door company that serves your area. Some of the companies we match you with are affiliated with Garage Door Science.