Garage Door Won’t Open? Step-by-Step Troubleshooting

You press the button and nothing happens — or the opener runs but the door doesn’t move. A garage door that won’t open can strand your car and disrupt your entire morning. Here’s a systematic approach to finding the cause.

Step 1: Check the Obvious

• Power — is the opener plugged in? Check for a tripped breaker or GFCI outlet. Some openers have a small LED that indicates power.
• Lock mode — many openers have a lock button on the wall control. When activated, the remote won’t work but the wall button will. Look for a lit lock indicator.
• Remote battery — if the wall button works but the remote doesn’t, replace the remote battery first.
• Manual lock — older doors have a manual lock handle on the inside. Check that it’s not engaged.

Step 2: Listen to the Opener

Press the button and listen carefully:

• Nothing at all — power issue, dead motor, or disconnected wall button wiring
• Clicks but no motor — the logic board sends the signal but the motor won’t start. Could be a capacitor or motor failure.
• Motor runs but door doesn’t move — the drive gear inside the opener has likely stripped. The motor spins but nothing transfers to the chain/belt. This is a common repair on aging openers.
• Motor runs, door starts then stops — the force limit is being triggered. The door is either too heavy (broken spring) or there’s an obstruction.

Step 3: Try the Emergency Release

Pull the red emergency release cord hanging from the opener rail. This disconnects the door from the opener, allowing manual operation. Try lifting the door by hand:

• Door lifts easily — the problem is the opener, not the door. Springs are fine.
• Door is extremely heavy — you likely have a broken spring. The opener cannot lift the full weight of the door alone. Do NOT force it. Call a professional.
• Door won’t budge — something is physically preventing movement. Check for a locked manual lock, debris in the track, or a roller that’s come off the track.

Step 4: Check the Springs

Look at the torsion spring(s) on the metal bar above the door opening. A broken spring will have a visible gap of 2–4 inches where the coils separated. If a spring is broken:

• Do NOT use the opener
• Do NOT attempt to repair it yourself
• The door is safe in the closed position — leave it there
• Call for professional spring replacement (typically same-day service)

Step 5: Inspect the Track

Look along both vertical tracks and the curved sections for:

• A roller that’s popped out of the track
• A bent or dented section of track
• Ice buildup at the bottom (rare in San Diego but possible in winter mornings in Temecula/Corona)
• Debris or an object wedged in the track

When to Call a Professional

Call for service if:

• A spring is visibly broken
• The opener motor runs but the door doesn’t move (stripped gear)
• The door is off its tracks
• You cannot identify the cause after these steps
• Any cable is loose, frayed, or dangling

Castle offers same-day and emergency repair service throughout San Diego and Riverside County.