Check the garage door springs to see if they are broken. Torsion springs will be found above the door on a long tube that spans the width of the garage door. If the spring is slack or you can see a separation anywhere along the coil, you have a problem with your spring. We recommend having a professional out to tighten or replace the spring(s). You can book a torsion spring repair on our home page. The cost ranges from $300-350 depending on the door size.
If the garage door springs appear to be intact, disengage the garage door opener by pulling the red emergency release rope towards the back of the garage. You should hear a click as the trolley is disengaged. Try to manually lift the garage door. If the door runs up and down fine by hand, you most likely have an issue with your garage door opener.