In Genie’s Safe-T-Beam chart, four red blinks followed by a pause with the green LED on means the source is not sending pulses or the source unit is defective. Genie directs users to customer service for this pattern rather than repeated alignment adjustments.
Read Genie Safe-T-Beam red and green LEDs together
What is each Safe-T-Beam eye reporting at the same time?
Record both LED states before choosing a blink-code branch.
Genie identifies the red LED unit as the source/transmitter and the green LED unit as the receiver. A blink count is not enough by itself: several diagnostic branches change depending on whether the other LED is steady, off or also abnormal.
This exact manufacturer signal can feed the following diagnostic family. Keep the original code or LED pattern when troubleshooting.
What you are likely to notice
- The red source LED blinks four times, pauses and repeats
- The green sensor LED remains on
- The door may refuse to close because the Safe-T-Beam system is not operating normally
Check these in order
1. Confirm four red blinks and green ON
Count the complete repeating pattern before changing anything. Genie assigns different causes to two, three and four red blinks, so the exact count matters.
2. Check the obvious wiring and power context
Inspect accessible low-voltage sensor wiring and confirm the opener is powered. Do not open the powered operator housing for trial-and-error checks.
3. Do not keep re-aiming sensors as the main fix
Alignment is the published branch for the two-blink pattern. Four blinks with green on points to the source not sending pulses or a defective source unit.
4. Use Genie support for the source fault
Genie’s own chart directs this condition to customer service. Record the opener model, sensor style and LED pattern so support can identify the correct next step.
Why four blinks are not an alignment code
Genie's Safe-T-Beam chart reserves two red blinks with green on for beam alignment, obstruction or sensor failure. Four red blinks with green on moves to a different diagnosis: the source is not sending pulses or the source unit is defective.
That distinction prevents endless bracket adjustments. Confirm the exact four-blink pattern, document the sensor/opener model and use Genie support if accessible wiring checks do not change the state.
Treat four blinks as a source-side problem, not proof of a failed part
The red LED unit is the transmitting source. Four blinks narrows the fault to that source-side branch, but it does not by itself prove the sensor hardware has failed. Confirm accessible wiring first; if it is intact, then use Genie support to determine whether the source sensor needs replacement.
Do not bypass Safe-T-Beam while waiting for a repair. The opener needs a functioning safety system for normal closing operation.
Four blinks is a source-pulse fault, not a generic obstruction code
In Genie's published Safe-T-Beam chart, four red blinks repeating with the green LED ON means the source is not sending pulses or the source is defective. Genie directs this condition to customer service. That makes it a different endpoint from the two-blink obstruction/alignment branch and the three-blink interference branch.
Before escalation, document the exact four-blink repeat, confirm green remains on and note the opener model. Avoid repeatedly realigning a sensor pair that is already reporting the source-pulse pattern. The diagnostic value is in showing that the receiver side still has a green indication while the source side is failing its expected pulse behavior.
- Confirm four red blinks repeat with green ON.
- Do not substitute the two-blink alignment procedure for a verified four-blink pattern.
- Capture model and LED video/photo before contacting Genie or a service professional.
For escalation, preserve the four-red-blink repeat with green still on, the opener model and whether the condition began after sensor or wiring work. Genie routes this pattern toward a source-pulse/source-fault branch, so the best handoff shows that the official pattern was actually observed rather than inferred from a closing symptom. Also note whether power cycling changes the pattern or it returns immediately.
Stop DIY troubleshooting when…
- The source sensor housing or wiring is damaged
- The pattern persists after accessible wiring checks
- The opener has visible electrical damage
- The door has an unrelated mechanical safety problem
Garage door springs, cables and a falling/unbalanced door can store or release dangerous force. Those are door-system problems, not just opener settings.
Common questions
What do four red Genie Safe-T-Beam blinks mean when green is on?
Genie's chart says the source is not sending pulses or the source unit is defective.
Is four blinks caused by misalignment?
Misalignment is in the two-blink branch. Four blinks with green on is a source/transmitter branch.
Should I replace both Safe-T-Beam sensors?
Do not assume both are bad. Confirm wiring and the exact pattern, then use Genie support for the source fault and correct replacement path.
Manufacturer sources used
These links are the factual baseline for the diagnostic claims above. Model-specific manuals can supersede general guidance.