Garage Door Won’t Open: Diagnose It in 5 Minutes

Silent — nothing happens at all

No motor sound, no lights:

• Check power — openers plug into a ceiling outlet that’s often on a GFCI circuit; reset any tripped GFCI (commonly in the garage or a bathroom) and check the breaker
• Remote-only silence? Swap the remote battery, then test the wall button — if the wall button works, it’s remote programming, not the opener
• Wall button dead too — look for the lock/vacation switch on multi-function wall consoles; it disables remotes deliberately and gets bumped constantly
• Still nothing with power confirmed: the logic board or transformer has likely failed — pro territory, and a routine bench swap for a tech

Hums or clicks, but the door doesn’t move

The motor is trying; the drivetrain isn’t answering:

• Trolley disengaged — someone pulled the red release cord; re-engage per your manual (usually cycle the opener or pull the cord toward the door until it clicks)
• Stripped main gear — the classic hum-with-no-motion on chain units; a gear kit is a standard single-visit repair
• Sheared coupling/carriage on screw drives — same symptom, Genie flavor; similarly routine
• Frozen to the slab in winter — the bottom seal ice-welds to concrete; break the seal manually (door disengaged), never by holding the button

Starts to lift, then stops or strains

A door that opens a few inches and quits is protecting itself: the opener senses more weight or resistance than its force limit allows. Causes ranked: a broken or weakened spring (check for a ~2-inch gap in the torsion coil above the door), binding rollers or a bent track, or force limits set too low after someone adjusted them. The test: pull the release and lift manually — a healthy balanced door lifts with one hand and stays put half-open. If it’s heavy, it’s springs; if it sticks at one spot, it’s track/rollers; if it’s light and smooth, it’s the opener’s settings or drivetrain.

When to stop DIY and call

Call a pro immediately for: any suspected spring or cable failure (bang, coil gap, slack/derailed cables, crooked door), a door off its track, or a door that’s heavy in manual mode. These are tensioned-system failures — the repairs are routine precisely because trained techs do them daily, and they stop being routine when a DIY attempt bends panels or worse.