# How your garage door works, and what to do when it does not

> For anyone with a garage door and no repair experience. By the end you will know what each part does, spot a worn spring, run the monthly safety check, and know when to call a technician.

Source: https://garagedoorscience.com/academy/how-your-garage-door-works · For homeowners · Beginner · 33 min · free

## Module 1: The parts and how they work

- [What each part of your garage door does](https://garagedoorscience.com/academy/how-your-garage-door-works/what-each-part-does) (4 min)
- [Why a heavy door feels light in your hand](https://garagedoorscience.com/academy/how-your-garage-door-works/why-a-heavy-door-feels-light) (4 min)

## Module 2: Springs, and why they are a technician's job

- [The springs do the lifting, so leave them to a technician](https://garagedoorscience.com/academy/how-your-garage-door-works/what-the-springs-do) (4 min)
- [Signs a spring is wearing out or has broken](https://garagedoorscience.com/academy/how-your-garage-door-works/signs-a-spring-is-wearing-out) (4 min)

## Module 3: Safety systems and the monthly check

- [How your door knows to stop and go back up](https://garagedoorscience.com/academy/how-your-garage-door-works/how-the-door-knows-to-stop) (4 min)
- [The monthly check you can do yourself](https://garagedoorscience.com/academy/how-your-garage-door-works/the-monthly-check) (5 min)

## Module 4: Repair or replace, and finding a pro

- [Repair it or replace it?](https://garagedoorscience.com/academy/how-your-garage-door-works/repair-or-replace) (4 min)
- [When to stop and call a technician](https://garagedoorscience.com/academy/how-your-garage-door-works/calling-a-technician) (4 min)