If your garage door wall button isn't working, several causes related to wiring, power, and button itself can be fixed with systematic troubleshooting. First, check if door works with remote, as if remote works but wall button doesn't, problem is isolated to wall console. Inspect wall button for damage, stuck button, or loose wires behind it, as button may be worn after years of use. Turn off power to opener, remove wall button cover, and check wiring connections, as two low-voltage wires connect to terminals and may be loose, corroded, or disconnected, so tighten screws and ensure wires are secure. Check wiring running from wall button to opener unit for damage, staples piercing wire, or rodent chew, as damaged wire prevents signal, and replace wire if needed with 18 to 22 gauge bell wire costing 10 to 20 dollars. Try shorting the two wires at opener unit by touching them together, as if door operates, wall button is faulty and needs replacement costing 20 to 50 dollars. Check if wall console is in lock mode, as some LiftMaster consoles have lock button that disables wall button, so press and hold lock button for 5 seconds to unlock. Ensure opener has power, as wall button needs power from opener. If button still fails after checking wiring and replacing button, opener logic board may have failed and needs professional diagnosis costing 150 to 300 dollars. Clean button contacts with electrical contact cleaner to restore function.
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