Why Your Garage Door Will Not Open

By the San Marcos Garage Door Repairs team · Updated September 2026

Start With What the Opener Is Doing

The most useful observation is whether the opener motor runs. Silence when you press the button usually points to a power, remote or control problem. A motor that runs while the door stays put means something between the two has failed, or the door is too heavy to lift. A door that starts and then stops usually means mechanical resistance or a travel setting.

Those three descriptions send a technician down three completely different paths, so it is worth standing in the garage and listening carefully before you call. Note whether any lights on the opener are flashing, and how many times they flash, because most manufacturers use that as a diagnostic code.

Power, Remotes and Wall Buttons

Check the obvious ones first. Openers get unplugged for holiday lights and never plugged back in. Breakers trip. Remote batteries die, usually after slowly getting weaker for a fortnight. If the wall button works normally but no remote does, the fault is almost certainly in the remotes or the receiver rather than the opener itself, and that is a small repair.

If nothing responds at all, confirm that the outlet in the ceiling has power. Beyond that, leave the wiring alone. Opener control wiring runs to the wall station and the safety sensors, and pulling at it to test connections is a good way to turn a simple fault into a longer one.

A Broken Spring

This is the most common cause of a door that genuinely will not lift. The springs carry the weight, so when one breaks, the opener is suddenly asked to raise the full mass of the door and it simply cannot. You may hear it strain, hum or click out. Often the failure announced itself earlier with a loud bang.

Do not try to lift the door by hand to test the theory. A door with a failed counterbalance is far heavier than people expect and can drop. Keep the opener switched off so nobody cycles it, keep the area clear and have the spring system inspected.

Cables, Rollers and Tracks

If the door is hanging at an angle, sitting lower on one side, or jammed diagonally in the opening, a cable has probably come off its drum or a roller has left the track. Sometimes both, because one usually causes the other. The door may still be held, but it is being held unevenly, and running the opener again risks twisting it further.

Look for a slack cable, a cable wound unevenly on the drum, or rollers visibly out of the track. All of those are reasons to stop. The repair itself covers cables and rollers or off-track work, depending on how far the door has moved out of line.

Safety Sensors and Manual Locks

Safety sensors mostly prevent closing rather than opening, but a sensor fault can put some openers into a protective mode that limits what they will do. Look at the two small units near the floor on either side of the opening. A steady light on both usually means they are happy; an off or blinking light means alignment, dirt or wiring needs attention.

Then there is the lock nobody remembers. Many doors have a manual slide lock or a T-handle that engages a bar into the track. If it has been thrown, the opener will strain against a door that is physically bolted shut. It is worth a look before you assume the worst, and it costs nothing to check.

What Not To Do While You Wait

Do not keep pressing the button. Repeated attempts against a stuck door bend tracks, strip opener gears and turn a small fault into a large bill. Do not pull the emergency release while the door is raised: it can come down under its own weight the moment the trolley disengages.

If a vehicle is shut inside and you need it, say so when you arrange the visit rather than improvising. Freeing a trapped car safely is a normal part of the call, and it is much easier done with the door properly supported.

Doors That Will Not Open Around San Marcos

Two local patterns come up again and again. The first is seasonal: the first hard cold front of the winter brings a wave of spring failures across San Marcos and the surrounding towns, because aging steel contracts and gives up overnight. The second is the student rental cycle, where a garage that has been used mostly for storage suddenly gets operated daily again and everything worn in it announces itself at once.

Property type matters too. Detached garages and workshop doors out on Hill Country lots are often older and used less, so faults go unnoticed for longer. Our Wimberley garage door service page covers how those visits are planned around long driveways and gates.

Arrange an Inspection

If the door will not lift and nothing simple explains it, leave it closed. San Marcos Garage Door Repairs will inspect the springs, cables, track and opener together, explain which one failed and quote before any part is changed. The full list of repairs is on the services page.

If this is the third or fourth fault in a short stretch, read repair versus replacement before deciding, then describe the symptoms so the right parts come out with the technician.