Chamberlain Opener Error Code 1-6: Meaning and Fix
Also shown as: 16, Up 1 Down 6
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. Chamberlain boards use the same flash chart as LiftMaster; the Learn button color matters.
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.
What causes 1-6
- A door that is out of balance so it keeps drifting
- Travel limits set too tight or lost
- A worn gear or travel module
- A loose chain or belt letting the carriage slip
How to fix it
- Disconnect the trolley and test balance: the door should stay roughly half open.
- Call a pro for spring or balance adjustment if it drifts.
- Re-run the limit and force setup per the manual.
- Tighten the chain or belt to the manual spec.
- Replace the travel module or gear kit if it keeps coasting.
Parts you may need
Questions
Why do I see 1-6 on my Chamberlain?
The door moved after the motor stopped, which usually means poor balance or lost limits.
Can I reset it?
Reset the limits per the manual, but fix the balance first.
Is it dangerous?
An unbalanced door can drop; have springs adjusted by a professional.
Other Chamberlain opener codes
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 B4505T, B2212T, B6713T, B2202T, C2405T, RJO20.