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error Chamberlain
Error Code 3 UP / 2 DOWN
Unable to set the travel or retain position.
? What Causes This
Travel module is not properly assembled or is faulty.
✓ How to Fix It
Check travel module for proper assembly and replace if necessary.
Source: page 37 of the official manual
From the manual
This error code appears in:
Chamberlain Chamberlain Garage Door Opener