Chamberlain error codes

Chamberlain makes the openers sold at home centers and shares its logic boards and diagnostic code tables with LiftMaster and Craftsman. The faults show as a flash count on the Learn LED or the motor-head display. The codes apply to model numbers such as B4505T and B2212T; check the label on your unit to confirm yours.

26 codes across 1 appliance type.

Chamberlain opener code Yellow Learn LED rapid flash: opener

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Chamberlain opener codes

Yellow Learn LED rapid flashStuck button on a remote or keypad 1-1Safety sensor wire open or sensors not connected 1-2Safety sensor wire shorted or reversed 1-3Door control wire shorted 1-4Safety sensors misaligned or beam blocked 1-5Travel module or RPM sensor fault 1-6Door coasting after stopping 2-1Logic board fault 2-1 2-2Logic board fault 2-2 2-3Logic board fault 2-3 2-4Logic board fault 2-4 2-5Logic board fault 2-5 3-2Travel limits lost after power return 3-3Battery charging circuit error 3-5Door stops open or reverses to closed limit 4-1Force or travel fault, door reverses before floor 4-3Door stops and reverses just before the floor 4-4Door stops before reaching full open 4-5Travel module connection or door movement fault 4-6Safety sensors blocked or misaligned 1 flashSafety sensor wire broken or disconnected 2 flashesSafety sensor wire shorted or reversed 3 flashesDoor control (wall button) fault 4 flashesSensor beam misaligned (sender steady, receiver dim)5 flashesNo RPM pulses detected in the first second 6 flashesMotor circuit failure