Liftmaster 1 3 Hp Troubleshooting. Liftmaster garage door openers · liftmaster 2000sdr manual. Look also for cobwebs on the door tracks, because they could also be blocking the light.

Another reason for the sensors to misalign is that the door track is loose. Find liftmaster model 1345 replacement parts direct from the source. The battery status led* is continually flashing green.