# Chamberlain code 4-5: the opener runs a few inches, stops and goes back

Source page: https://garagedoorscience.com/code/chamberlain-error-codes/4-5

## The opener runs a few inches, stops and goes back

The opener has lost contact with its travel module, the part that tracks where the door is.

**Call a pro.** Have a pro check the travel module’s connections and replace the module if needed.

From the maker’s manual:
- Chamberlain manual for model B980, PDF page 40: https://cgi.widen.net/content/vlzppckqt9/original/114a5126.pdf
- Chamberlain manual for models B4603T, B4643T, B4613T, B6713T, B6753T, PDF page 43: https://cgi.widen.net/content/zwq7paf7l4/original/114-5739-000.pdf

Garage Door Science isn’t affiliated with the opener makers LiftMaster, Chamberlain or Genie. Each meaning is our summary of the maker’s own manual, which we link.