# Chamberlain code 1-1: the door won’t close because the safety sensors aren’t connected

Source page: https://garagedoorscience.com/code/chamberlain-error-codes/1-1

## The door won’t close because the safety sensors aren’t connected

The opener can’t find its safety sensors, the two small eyes near the floor on each side of the door. A sensor may be unplugged, or its wire may be cut.

**Check this first, then a pro.** Follow the thin wire from each sensor back to the opener and look for a loose end or a cut. If the wire looks fine and the code comes back, call a pro.

From the maker’s manual:
- Chamberlain manual for model B980, PDF page 40: https://cgi.widen.net/content/vlzppckqt9/original/114a5126.pdf
- Chamberlain manual for models B4603T, B4643T, B4613T, B6713T, B6753T, PDF page 43: https://cgi.widen.net/content/zwq7paf7l4/original/114-5739-000.pdf

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.