San Marcos, Texas · Hays County · 78666
Garage Door Troubleshooting Guide for San Marcos Homes
Door won’t open, won’t close, makes a racket or quit after a storm? Find your symptom below to see the likely cause, what you can safely check yourself, and when to call a professional.
Find your symptom
What is your garage door doing?
Pick the closest match. Each one links to a page with the full explanation and typical repair cost.
Symptom
It won’t open and I heard a bang
Almost always a broken spring. Don’t keep pressing the opener.
Symptom
It won’t close and the lights blink
Usually the safety sensors are blocked, dirty, misaligned or blinded by low sun.
Symptom
The opener hums but the door won’t move
A stripped drive gear, a disconnected trolley or a broken spring.
Symptom
The door is crooked or stuck halfway
A cable has slipped or snapped, or a roller has left the track.
Symptom
It’s grinding, squealing or banging
Worn rollers, dry hinges, loose hardware or a chain-drive opener.
Power outage
How to open your garage door during a power outage
Storms can knock out power across Hays County. If your opener has no battery backup, here’s how to open the door by hand — safely.
- Make sure the door is fully closed before you pull the release. A partly open door can drop if a spring is weak or broken.
- Pull the red emergency release cord hanging from the opener rail, straight down. This disconnects the door from the opener.
- Lift the door from the bottom handle, keeping fingers away from the panel joints. A balanced door should lift with little effort.
- If the door feels very heavy, stop. That usually means a broken spring — don’t force it.
- When power returns, run the opener once; on most models the trolley reconnects automatically. If not, pull the cord toward the door and run it again.
Want it to work during the next outage? A battery-backup opener keeps running for a number of cycles without power.
DIY or pro
What’s safe to check yourself — and what isn’t
- Safe: checking power and the GFCI outlet, the lock button on the wall control, remote batteries, cleaning and lining up the safety sensors, lubricating hinges and rollers.
- Call a pro: anything involving springs, cables, bottom brackets, bent tracks, or the opener’s internal gears and boards. These hold heavy tension or need parts matched to your door.
FAQ
Garage door troubleshooting FAQ
Why won’t my garage door open?
The most common causes are a broken spring, a tripped outlet or power outage, the lock button on the wall control, or an opener with a stripped gear. If you heard a bang, check for a gap in the spring above the door.
Why won’t my garage door close all the way?
Usually the safety sensors near the floor are blocked, dirty or misaligned, so the opener reverses. Travel limits that need resetting are the next most common cause.
How do I open my garage door without power?
Make sure the door is fully closed, pull the red emergency release cord, and lift the door by its bottom handle. If it feels very heavy, stop — a spring may be broken.
Why does my garage door opener work in the morning but not in the afternoon?
Low sun can blind the safety sensors on west-facing garages, and heat can push a strained opener into thermal shutdown. Shading the sensors and balancing the door usually helps.
Related
Related help
Garage door problem? Get a straight answer.
Call us. We’ll tell you what’s likely wrong and what it usually costs — before anyone comes out.
No obligation. Written quote before any work.