How Do Garage Door Openers Work?

Garage Door Repair

How Garage Door Openers Work

garage door repair san antonio texas

Homeowners often take their garage door openers for granted and are unaware of how complicated they actually are, until they malfunction, causing them stress and inconvenience.  Homeowners fail to realize that they are using these openers, on average, 1500 times a year, and this constant use will cause them to need to be serviced and repaired from time to time.  The experts at San Antonio Overhead Pros know how important a properly functioning door opener is to homeowner's lives and can install and service any opener.  Listed below is information on how garage door openers work.

Types of Garage Door Openers


Chain door openers work using a chain that will open and lower the door.  These are the most economical door opener but can be extremely noisy.


Belt door openers work using a heavy-duty steel-reinforced rubber belt to open and lower the door.  While these openers are more expensive, they run smoother, lack vibration, and produce significantly less noise.


Screw-driven door openers work similar to belt drives and use a trolly gliding along a threaded steel rod to open and lower the door.  These openers are very quiet and are ideal for homeowners who require less noise.

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Garage Door Opener Repair and Installation

how garage door openers work

Garage Door Opener Parts

Regardless of which type of opener you have they all operate using most of the same parts that are listed below:


All types of openers require an electric motor to raise and lower the heavy door.  This motor needs to have enough power to operate the door properly as well as immediately stop it if the safety sensor alerts that there is an object in the path of the door.

Drive Guide

The drive guide is the part that connects the opener to the mechanism attached to the door and is responsible for protecting the chain, belt or screw as the door raises and lowers.


For the door opener to work, it will require power, and the inverter is responsible for converting AC power to DC current to power the motor.


Newer model garage door openers include a battery backup feature that allows the system to work even if the power supply is shut off.

Height Adjustment

Height adjustment allows you to control and adjust the doors motion to ensure that it is opening and closing completely.

Putting It All Together

All garage door openers operate using a radio transmission system; when you click the button on your remote, it sends a code to the opener to raise or lower the door.  For enhanced security, new openers are equipped with a controller chip that changes the code each time the remote is used, making it difficult for potential criminals to access the system.

The experts at San Antonio Overhead Pros have a staff of educated and experienced technicians available to answer any questions you may have regarding your garage door opener.  We are available for service calls and can inspect, repair, and replace any type door opener.

Do you need your garage door fixed?

Call our team today for expert overhead door repairs and installations.