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1-1

Craftsman Garage Door Opener

Severity: Moderate

Source: OnlyErrorCodes.com — Every error code. One place.

Craftsman Garage Door 1-1 Blink Code — Fix

What Does This Error Mean?

Craftsman openers (manufactured by Chamberlain) use the same blink-code system. 1-1 means the photo-eye safety sensors are not connected to the opener. Check the sensor wiring at both ends — at the opener terminals and at each sensor.

How to Fix It

  1. Look at the LED on the back of the Craftsman motor head. When the wall button is pressed and the door does not respond, count the flash pattern. One flash, pause, one flash means 1-1.

  2. At each Safe-T-Beam style sensor, check the LEDs. If both LEDs are completely off, the sensor is not receiving power — confirming a wiring fault somewhere between the opener and the sensor.

  3. Trace the white and white-with-stripe wires from the back of the opener (terminal block, screws labelled 2 and 3) down the wall and across the floor to each sensor.

  4. Check every staple along the wire path. Staples driven too deep cut the insulation and create open or shorted circuits. Repair any damaged section by cutting out the bad section and splicing in new wire with crimp connectors.

  5. At each sensor, confirm the wires are firmly connected to the sensor terminals. Loose screws are a frequent cause of intermittent 1-1 errors.

Frequently Asked Questions

Are Craftsman and Chamberlain openers the same?

Craftsman garage door openers are manufactured by Chamberlain and use the same logic boards, blink codes, and remotes (orange/red Security+ for older models, yellow Security+ 2.0 for newer). Chamberlain replacement parts usually fit Craftsman openers.

Can I use Chamberlain replacement sensors on a Craftsman opener?

Yes. Genuine Chamberlain replacement Safe-T-Beam style sensors (model 41A5034 or similar, depending on year) work directly with Craftsman openers. Look for the matching wiring colour scheme.

What if I cannot find replacement parts for my Craftsman opener?

Sears no longer sells most Craftsman opener parts directly. Use the model number from the motor head label to look up the equivalent Chamberlain or LiftMaster part — they are virtually identical.