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Overhead Door Opener Error Code Safe-T-Beam red LED flashing: Meaning and Fix

Safe-T-Beam red LED fla…
How Safe-T-Beam red LED flashing appears on a Overhead Door opener display.
Overhead Door opener Safe-T-Beam sensor
Genie Company product image, store.geniecompany.com

Also shown as: Red sensor light blinking

Reading the opener display

A garage door opener reports faults through blinking LEDs on the motor head, a diagnostic window on the logic board, or the wall control. Count the flashes slowly and repeat the count before you decide what you saw. Overhead Door uses red and green LEDs; note which color is flashing and how many times.

Overhead Door openers (Legacy and Odyssey lines) report problems through red and green LED patterns on the powerhead. Count the blinks of the color that is lit and match them to the table. The codes apply to model numbers such as Legacy 850 and Legacy 920; check the label on your unit to confirm yours.

What causes Safe-T-Beam red LED flashing

How to fix it

  1. Wipe both lenses and clear the beam.
  2. Reaim each sensor until the LED is solid.
  3. Check wire connections at the sensors and powerhead.
  4. Look for staples or damage in the cable.
  5. Replace the sensors if the LED stays red.

Parts you may need

PartPart no.Buy
Safe-T-Beam sensors37220RFind part

Part numbers are OEM references; confirm fit by your model number before ordering. Some links are affiliate links; we may earn a commission at no extra cost to you.

Questions

Why is my Genie sensor blinking red?

Misalignment, dirt or lost power.

Will the door close?

Not until the beam is restored.

Which part?

37220R on Excelerator.

Other Overhead Door opener codes

Overhead Door opener code Red LED continuous: remote (Genie-built opener part image shown as a generic reference)Red LED continuousProgramming incompleteOverhead Door opener code Red LED 1 blink: remote (Genie-built opener part image shown as a generic reference)Red LED 1 blinkTransmitter has not learnedOverhead Door opener code Green LED 1 blink: Safe-T-Beam sensor (Genie-built opener part image shown as a generic reference)Green LED 1 blinkLimits incomplete or door obstructionOverhead Door opener code Green LED 2 blinks: Safe-T-Beam sensor (Genie-built opener part image shown as a generic reference)Green LED 2 blinksUp limit, wiring or sensor alignmentOverhead Door opener code Green LED 3 blinks: control board (Genie-built opener part image shown as a generic reference)Green LED 3 blinksLimits set backwardsOverhead Door opener code Green LED 4 blinks: wall console (Genie-built opener part image shown as a generic reference)Green LED 4 blinksWall button wire short or reversed

Sources

Part numbers are OEM references; confirm fit by your model number before ordering. Meanings compiled from manufacturer and parts-retailer documentation; see sources below. Unplug the appliance before opening it.

Applies to models including Legacy 850, Legacy 920, Odyssey 1000, 1026, 2029.