LiftMaster code 1-1
The door won’t close because the safety sensors aren’t connected
Check this first, then a proThe 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.
What to do: 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 manuals:
- LiftMaster manual, PDF page 43 for the 8160W and 5 more models
- LiftMaster manual, PDF page 36 for 8587W and 8587WL
- LiftMaster manual, PDF page 38 for 8360W
- LiftMaster manual, PDF page 32 for 8500WMC and 8500WMC-267
- LiftMaster manual, PDF page 44 for the 87504-267 and 4 more models
Which models each manual covers
- LiftMaster manual for models 8160W, 8160WB, 8164W, 8165W, 8365W-267, 8155W
- LiftMaster manual for models 8587W, 8587WL
- LiftMaster manual for model 8360W
- LiftMaster manual for models 8500WMC, 8500WMC-267
- LiftMaster manual for models 87504-267, 84504R, 84505R, 87802, 84602
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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.
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