Garage Door Won't Open: Troubleshooting Guide

A garage door that will not open is frustrating, especially when you are trying to leave for work. Most causes fall into a handful of categories. Work through this list in order: you can often identify the problem without a technician.

Step 1: Check the Power

The simplest explanation is often right. Check that the opener is plugged in. Check the outlet with another device. Check whether the circuit breaker for that garage circuit has tripped.

Power outages in Pittsburgh during storms are common. If the power went out and came back, the opener may have lost its programming and needs to be reprogrammed.

Step 2: Check the Remote

Before assuming the opener is broken, try the wall button inside the garage. If the wall button works and the remote does not, the issue is with the remote.

• ›Replace the remote batteries (most use 3V CR2032 coin batteries or AA batteries)
• ›Check that the remote is in range: remote range is typically 20-30 feet
• ›If the remote was recently near a device that could reprogram it (rare), it may need to be re-paired to the opener

Step 3: Check the Door Lock

Most garage doors have a manual lock bar. If it was accidentally engaged: or if a kid engaged it: the door is physically locked and the opener cannot move it.

Look for a horizontal slide bar on the inside of the door. If it is engaged, disengage it and try the door again.

Step 4: Check the Safety Sensors

Modern garage doors have safety sensors near the floor on both sides of the door. If these sensors are misaligned, blocked, or dirty, the door may refuse to close (or open in some configurations).

• ›Look at the sensors on both sides: each should have a steady light (one green, one amber on most systems)
• ›If a light is blinking, the sensor is blocked or misaligned
• ›Clear anything blocking the sensor beam
• ›Wipe the sensor lenses with a clean cloth
• ›Gently re-align the sensors so the beams are aimed at each other: the lights will become steady when aligned

Step 5: Check the Spring

If the opener motor runs but the door does not move or only moves an inch, the spring is likely broken. Look above the door for the large coiled spring mounted on a steel shaft.

A broken spring has a visible gap in the coils: usually one to two inches wide. If you see this gap, stop pressing the opener button and call for spring repair. Do not attempt to fix it yourself.

Step 6: Check the Emergency Release

Every opener has a red emergency release cord hanging from the rail. If someone pulled this cord (intentionally or accidentally), the door is disconnected from the opener and cannot be operated remotely.

To reconnect: manually open the door to the fully open position, then pull the release cord back toward the door (not away from it) until you hear or feel it click back into the opener carriage. Then try the opener again.

Step 7: Listen to the Opener

If the motor runs, you can learn a lot by listening.

• ›Motor runs, grinding noise: stripped gear inside the opener: needs repair or replacement
• ›Motor hums but does not run: capacitor failure: needs professional repair
• ›Motor runs, door moves slightly then stops: spring issue or force setting is off
• ›No sound at all from the motor: power issue, logic board failure, or dead wall button

When to Call a Technician

If you have checked all of the above and the door still will not open, call a professional. The remaining causes: broken spring, stripped gear, logic board failure, bent track: all require tools and experience to fix correctly.

Pittsburgh homeowners can get same-day service in most cases. Do not leave a door stuck open or stuck closed if you can avoid it: both create problems.