Home Fault Codes

Chamberlain opener codes

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. Chamberlain boards use the same flash chart as LiftMaster; the Learn button color matters.

Models covered: B4505T, B2212T, B6713T, B2202T, C2405T, RJO20.

Chamberlain opener code Yellow Learn LED rapid flash: opener

All 26 codes

Chamberlain opener code Yellow Learn LED rapid flash: openerYellow Learn LED rapid flashStuck button on a remote or keypad (DIY)Chamberlain opener code 1-1: safety sensor pair1-1Safety sensor wire open or sensors not connected (DIY)Chamberlain opener code 1-2: safety sensor1-2Safety sensor wire shorted or reversed (DIY)Chamberlain opener code 1-3: wall control panel1-3Door control wire shorted (DIY)Chamberlain opener code 1-4: safety sensor with sunblocker1-4Safety sensors misaligned or beam blocked (DIY)Chamberlain opener code 1-5: travel module1-5Travel module or RPM sensor fault (pro repair)Chamberlain opener code 1-6: gear and sprocket kit1-6Door coasting after stopping (pro repair)Chamberlain opener code 2-1: logic board2-1Logic board fault 2-1 (pro repair)Chamberlain opener code 2-2: logic board2-2Logic board fault 2-2 (pro repair)Chamberlain opener code 2-3: logic board2-3Logic board fault 2-3 (pro repair)Chamberlain opener code 2-4: logic board2-4Logic board fault 2-4 (pro repair)Chamberlain opener code 2-5: noise filter board2-5Logic board fault 2-5 (pro repair)Chamberlain opener code 3-2: travel module3-2Travel limits lost after power return (DIY)Chamberlain opener code 3-3: battery backup3-3Battery charging circuit error (DIY)Chamberlain opener code 3-5: travel module3-5Door stops open or reverses to closed limit (pro repair)Chamberlain opener code 4-1: opener4-1Force or travel fault, door reverses before floor (pro repair)Chamberlain opener code 4-3: opener4-3Door stops and reverses just before the floor (DIY)Chamberlain opener code 4-4: opener4-4Door stops before reaching full open (DIY)Chamberlain opener code 4-5: RPM sensor4-5Travel module connection or door movement fault (pro repair)Chamberlain opener code 4-6: sensor bracket4-6Safety sensors blocked or misaligned (DIY)Chamberlain opener code 1 flash: safety sensor1 flashSafety sensor wire broken or disconnected (DIY)Chamberlain opener code 2 flashes: safety sensor2 flashesSafety sensor wire shorted or reversed (DIY)Chamberlain opener code 3 flashes: wall control panel3 flashesDoor control (wall button) fault (DIY)Chamberlain opener code 4 flashes: safety sensor with sunblocker4 flashesSensor beam misaligned (sender steady, receiver dim) (DIY)Chamberlain opener code 5 flashes: RPM sensor5 flashesNo RPM pulses detected in the first second (pro repair)Chamberlain opener code 6 flashes: logic board6 flashesMotor circuit failure (pro repair)

About Chamberlain 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.