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

Source page: https://garagedoorscience.com/code/liftmaster-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:
- LiftMaster manual for models 8160W, 8160WB, 8164W, 8165W, 8365W-267, 8155W, PDF page 43: https://cgi.widen.net/content/48v3oqprah/original/114-5713-000.pdf
- LiftMaster manual for models 8587W, 8587WL, PDF page 36: https://cgi.widen.net/content/6mgkh9ncqr/original/114-5802-000.pdf
- LiftMaster manual for model 8360W, PDF page 38: https://cgi.widen.net/content/fagrnphm67/original/114a4914.pdf
- LiftMaster manual for models 8500WMC, 8500WMC-267, PDF page 32: https://cgi.widen.net/content/jwcqmmesfs/original/114-5706-000.pdf
- LiftMaster manual for models 87504-267, 84504R, 84505R, 87802, 84602, PDF page 44: https://cgi.widen.net/content/p6wp8jmdwr/original/114-5898-000.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.