On the covered Genie screw-drive garage door opener, Red LED flashes 3 times, pauses and repeats, and green LED is ON means genie's service table, as Sears PartsDirect publishes it, lists this code as: safety reversing sensor interference. Look at where direct sunlight falls on the sensors.
Differential
Likely causes of “Genie screw-drive garage door opener showing Red LED flashes 3 times”, and how to tell them apart
- 1
The safety reversing sensors are being disturbed by interference (three flashes)
What separates it The red LED flashes three times and the door will not close
How to confirm Look at where direct sunlight falls on the sensors
- 2
Direct sunlight on the receiving sensor
What separates it The door fails to close in the morning or the evening
How to confirm Fit the sending sensor on the side of the door that gets the most sun
- 3
Infrared flood lights near the door
What separates it A motion light shines across the beam
How to confirm Move or remove the infrared source
- 4
A sensor lens that is dirty
What separates it The lens is dusty
How to confirm Wipe it
- 5
A sensor that is damaged
What separates it The code stays in shade
How to confirm Replace the sensor
Before you touch a setting
Record this first — changing settings destroys the evidence
- That the red LED flashes three times
- What time of day the fault appears
- Whether any infrared lights are near
- The opener model
Try in this order
0 of 7 completedCorrect only the documented fault domain
ReversibleDirect sunlight can interfere with the safety reversing sensor beam. Install the sending sensor (the one with the red LED light) on the side of the door that's exposed to the most direct sunlight to minimize interference. Move or eliminate any sources of infrared beams such as infrared sensing flood lights near the garage door.
Note when the fault appears
ReversibleIf the door fails to close at one time of day, such as early morning or late afternoon, direct sunlight on a sensor is the likely cause.
Move the sending sensor to the sunny side
ReversibleThe table says to fit the sending sensor, the one with the red LED light, on the side of the door that is exposed to the most direct sunlight to minimize interference.
Remove sources of infrared light
ReversibleMove or remove infrared sensing flood lights and similar devices near the garage door, since their beams can disturb the sensors.
Clean both sensor lenses
ReversibleWipe the lenses with a soft dry cloth, because dust and cobwebs can add to the problem.
Test the door several times
ReversibleClose and open the door several times at different times of the day to see whether the fault has gone.
Replace a damaged sensor
ReversibleIf the code stays in shade and at night, a sensor may be damaged and should be replaced.
Model-specific
What is true of this model and not of its siblings
- The code on this page
- Red LED, three flashes, safety reversing sensor interference.
- Parts involved
- The safety reversing sensors and any infrared source.
- Source
- Sears PartsDirect's table for Genie screw-drive openers.
- How the beam works
- The two sensors send an invisible beam across the doorway. If something breaks the beam, the opener stops or reverses, so that the door cannot close on a person, a pet or a car. Sunlight and some lamps contain the same invisible light, which is how they confuse the sensors.
- Never defeat the sensors
- The sensors are a legal safety requirement on modern openers. Taping them over or disconnecting them to get the door to close removes the protection that stops the door crushing someone, so fix the interference instead.
Stop boundary
When this stops being a self-service repair
- !If the door will not close with the sensors clear, call a garage door technician
- !Never defeat the safety reversing sensors
- !Keep people and pets clear of a door that closes unexpectedly
Evidence ledger
Sources behind this answer
Exact questions
Common questions
What does Red LED flashes 3 times, pauses and repeats, and green LED is ON mean on a Genie screw-drive garage door opener?+
Genie's service table, as Sears PartsDirect publishes it, lists this code as: safety reversing sensor interference.
Can sunlight cause it?+
Yes.
Which sensor goes on the sunny side?+
The sending sensor, with the red LED.
Can an infrared light cause it?+
Yes.
Can I bypass the sensors?+
No.
Why does the fault come and go during the day?+
Because the sun moves, and the angle at which it hits the sensor changes.
Can a shade or a hood help?+
A small shade over the sunny sensor can help, as long as it does not block the beam.