Chamberlain Opener Error Code 3-5: Meaning and Fix
Also shown as: 35, Up 3 Down 5
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 3-5
- A travel limit set incorrectly
- Worn travel module
- Obstruction on the rails
- A bound door, bent track or broken spring
How to fix it
- Disengage the trolley and move the door by hand, looking for binding.
- Fix mechanical problems first.
- Reset the travel limits per the manual.
- Check the travel module cable and connector.
- Replace the travel module if limits keep drifting.
Parts you may need
Questions
What does 3-5 mean?
A limit or travel problem that makes the door stop open or bounce back closed.
Can the door be closed manually?
Yes, using the emergency release.
Should I adjust the force?
Reset limits before touching force settings.
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.