Home Fault Codes

Craftsman Opener Error Code 4 flashes: Meaning and Fix

4 flashes
How 4 flashes appears on a Craftsman opener display.
Craftsman opener code 4 flashes: safety sensor with sunblocker (Craftsman openers are built by Chamberlain Group; a generic Chamberlain Group part or opener image is shown)
Chamberlain Group product image, chamberlain.com

Also shown as: Four flashes

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. Craftsman openers follow the Chamberlain flash chart.

Craftsman garage door openers are made by the Chamberlain Group under license, so they share the LiftMaster and Chamberlain diagnostic codes. Look for a model number starting with 139. on the label. Check the model label on your unit before using any chart.

What causes 4 flashes

How to fix it

  1. Clean lenses.
  2. Clear the beam.
  3. Realign.
  4. Tighten brackets.
  5. Test.

Parts you may need

PartPart no.Buy
Safety sensor kit041A5034Find part
Safety sensor bracket kit041A5266-3Find 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

What does 4 flashes mean on Craftsman?

Sensor alignment problem.

Why does the door reverse?

The beam is broken.

How to confirm?

Both LEDs should be solid.

Other Craftsman opener codes

Craftsman opener code Yellow Learn LED rapid flash: opener (Craftsman openers are built by Chamberlain Group; a generic Chamberlain Group part or opener image is shown)Yellow Learn LED rapid flashStuck button on a remote or keypadCraftsman opener code 1-1: safety sensor pair (Craftsman openers are built by Chamberlain Group; a generic Chamberlain Group part or opener image is shown)1-1Safety sensor wire open or sensors not connectedCraftsman opener code 1-2: safety sensor (Craftsman openers are built by Chamberlain Group; a generic Chamberlain Group part or opener image is shown)1-2Safety sensor wire shorted or reversedCraftsman opener code 1-3: wall control panel (Craftsman openers are built by Chamberlain Group; a generic Chamberlain Group part or opener image is shown)1-3Door control wire shortedCraftsman opener code 1-4: safety sensor with sunblocker (Craftsman openers are built by Chamberlain Group; a generic Chamberlain Group part or opener image is shown)1-4Safety sensors misaligned or beam blockedCraftsman opener code 1-5: travel module (Craftsman openers are built by Chamberlain Group; a generic Chamberlain Group part or opener image is shown)1-5Travel module or RPM sensor fault

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.