Garage door opener sensors.
Low voltage to safety sensor on genie garage door opener.
It is a beneficial device if you have kids or pets in your house.
I checked voltage where the wiring connects into the unit.
Garage door openers use a receptacle in the ceiling for power.
No led lights on either sensor.
The working of these sensors is quite simple.
It operates on a low voltage beam which completed the switch when the door is in.
However genie uses clips to secure the wires to the opener rail rather than stapling the wires to the ceiling.
On sears model 139 53990 garage door opener the safety sensors have now failed to work after an electrical storm.
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I have the model 139 53627srt garage door opener and the door sensors are not lighting.
Inspect the double strand insulated low voltage wires from each sensor to the back of the garage door opener.
I used the other door opener which is the same model for comparison took the sending sensor and touched the wires to the two voltage output screws on the functional door and it lit.
Each low voltage wire includes two strands.
The wired controller and sensors use low voltage wiring usually 24v to connect to the motor unit.
Garage door opener wiring.
The door will close only when holding down the button the voltage at the operator unit at the sensor wire connectors with the wires removed is about 1 1 2 volts.
Use the stepladder to inspect the wires near the upper part of a wall and at the ceiling.
Wiring a sensor for a genie garage door opener is much like any other opener.
It prevents the doors from automatically closing when anyone is in the doorway.