
Wall button not working (or door opens by itself)
A shorted or reversed wall-control wire is the usual cause, often from a staple. Phantom operation is commonly a shorted wall button or a stuck remote.
Before you start
- Unplug the opener before working on terminals.
Diagnostic steps
Unlock all 3 steps with expected values
Full library + AI assistant for $34.90, one time.
Get lifetime accessOnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work.