Why won't my garage door open when I press the button?

Your garage door won't open when you press the button due to several common causes related to power, mechanical failure, or opener settings that prevent door from lifting. First, check power, as opener may be unplugged, breaker tripped, or GFCI outlet tripped, so opener lights off indicate power issue, and ensure outlet works. Check if manual slide lock on door track is engaged that physically prevents door from opening and must be disengaged. Try wall button, as if wall button also fails, problem is opener or mechanical, not remote. Inspect safety sensors near floor for dirt or misalignment, as blinking LEDs can prevent opening in some models, cleaning and aligning until solid. Listen for motor humming, as humming with no movement suggests disconnected trolley from emergency release cord pulled, stripped drive gear, or door binding due to broken torsion spring or off-track rollers. Try opening manually by pulling emergency release cord, usually red cord, and lifting door; if door is very heavy, won't lift, or falls, torsion spring likely broken and requires professional replacement costing 200 to 400 dollars due to high tension danger, as door should lift easily when springs good. If door opens manually but not with opener, re-engage trolley by pulling cord toward door and running opener. Check remote battery, reprogram remote via Learn button, and check lock mode on wall console that disables remotes, holding lock button to unlock. Check travel limits and adjust if needed. Unplug opener 30 seconds to reset board.