Why Won’t My Garage Door Open or Close? A Troubleshooting Guide

When a garage door won’t open or close, the problem can lie anywhere in the system — from a dead remote battery to a broken spring. The key to fast diagnosis is to work through the causes systematically, starting with the simplest and most likely. This guide covers every major cause in order of likelihood and ease of diagnosis.

If your remote isn’t working, try the wall-mounted push button inside the garage before assuming a bigger problem.

• Wall button works, remote doesn’t: The remote battery is likely dead or the remote needs reprogramming. Replace the battery first (most use a 12V or 23A battery). If that doesn’t help, re-program using the “Learn” button on the opener motor unit.
• Wall button doesn’t work either: The issue is in the opener itself, the wiring, or the door mechanics — not just the remote.

Photo-eye sensors sit near the bottom of the door tracks on both sides, about 6 inches above the ground. They project an invisible beam — if the beam is interrupted, the door won’t close (but will still open).

• Check the indicator lights. Each sensor should have a solid (non-blinking) indicator light. One sensor transmits; the other receives. If either light is blinking or off, the sensors are misaligned, obstructed, or damaged.
• Clean the lenses. Wipe both sensor lenses with a dry cloth. Dust, spider webs, and debris are the most common cause of sensor issues in desert environments.
• Check alignment. Both sensors should face each other squarely. Loosen the mounting bracket wing nut, adjust the sensor until the indicator light goes solid, and re-tighten.
• Check for obstructions. Even a small leaf or piece of debris between the sensors can block the beam.

With the opener disconnected (pull the red cord), try lifting the door manually. This test reveals whether the problem is the opener or the door mechanics.

• Door lifts smoothly: The mechanical door is fine. The problem is in the opener — possibly a motor, gear, or trolley issue.
• Door is very heavy or won’t lift: A spring is likely broken or the door is out of balance. A broken torsion spring means the door has no counterbalance — it feels like its full weight (150–350 lbs) is on your hands. Do not force it. Call a professional.
• Door only opens a few inches then stops: This is almost always a broken spring causing the opener’s safety mechanism to halt operation. Look for a gap in the torsion spring coils above the door.
• Door is off track: If the door is skewed or a roller has jumped the track, do not force it. Call a technician.

The force (or sensitivity) settings control how much resistance the opener can push through before stopping or reversing. If set too low, the door may stop before completing its travel; if too high, the safety auto-reverse may fail.

• Force adjustment screws are typically labeled “Up Force” and “Down Force” on the opener motor unit.
• If the door stops before fully opening or closing and you’ve ruled out mechanical obstruction, try increasing the relevant force setting slightly.