Guide
Garage Door Won't Close Denver
Practical guidance for garage door won't close Denver — what to check, what not to force, and when to call Square One Garage Doors at (303) 994-0375.
Why Your Garage Door Won't Close — and What to Do About It
Something blocking the sensors is the most common reason a Denver garage door refuses to close. But it's not the only one. Work through the checks below in order. Some you can fix in five minutes; others need a trained tech before you touch anything.
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Start Here: The 10-Second Safety-Sensor Check
Every door made after 1993 has two photo-eye sensors mounted a few inches off the floor on either side of the opening. If they can't "see" each other, the door will reverse or refuse to move.
Check for these:
- Dirt, spider webs, or moisture fogging the lens
- A sensor knocked out of alignment (one LED should be green, one amber — both should be solid, not blinking)
- A stray piece of cardboard, a rake handle, or a garbage can sitting in the beam path
Wipe the lenses with a dry cloth. Gently nudge a misaligned sensor back toward the other one until both lights go solid. That alone clears the problem more often than people expect.
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Other Common Causes You Can Investigate Safely
The Door-Close Limit Is Off
Your opener has an adjustment that tells the motor how far to travel before it stops. If the limit is set too far, the door hits the floor and the opener interprets resistance as an obstruction — and reverses. Check your opener manual for the "down-travel limit" screw. Small adjustments only; a quarter-turn at a time.
A Remote or Keypad Signal Problem
Try closing the door from the wall button first. If the wall button works but the remote doesn't, the issue is the remote — dead battery, lost programming, or radio interference from a nearby LED bulb. Re-pair the remote or swap the battery before assuming the opener is broken.
Broken, Bent, or Popped Tracks
Walk the length of both tracks while the door is in the up position. Look for a visible bend, a gap where a track section separated, or rollers that have jumped out of the rail. A door that's off-track can jam partway down or refuse to move at all.
> Stop and call a tech if the door looks crooked, one side is lower than the other, or you hear grinding. Forcing a door that's off-track can damage panels and injure you.
Worn or Damaged Rollers
Nylon rollers crack in Colorado winters. Steel rollers rust. A single bad roller can create enough drag to trigger the opener's auto-reverse. Look for rollers that are visibly cracked, flat-spotted, or wobbling in the bracket. Roller replacement is a manageable DIY task only if the rollers are on the door sections themselves — not the bottom bracket, which is under spring tension.
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When to Stop and Call — Springs and Cables
If you see a broken torsion spring (the horizontal bar above the door has a visible gap) or a frayed or slack cable running along the bottom corners of the door, do not attempt to close the door manually and do not try to fix it yourself.
Torsion springs store hundreds of pounds of tension. An uncontrolled release can cause serious injury. This is not a scare tactic — it's the reason professional garage-door technicians use specialized winding bars and follow strict procedures.
The same rule applies to extension springs (the long springs above the horizontal tracks on either side) and any cable that has slipped off its drum.
Call us instead: (303) 994-0375
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Denver-Specific Things Worth Knowing
Colorado's temperature swings hit garage doors hard. A door that seals and moves fine in October can bind in January when the steel contracts and the bottom seal stiffens. If your door started refusing to close after a cold snap:
- Check that the bottom seal hasn't frozen to the floor (pour warm water along the base if it's stuck)
- Look for frost or ice on the sensor lenses
- Let the garage warm up slightly and try again
Front-range wind is also a factor. Sustained gusts can physically push a door off its limit or trigger vibration sensors on newer openers. If the door only misbehaves on windy days, the opener's sensitivity may need adjustment.
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Quick Diagnostic Summary
| Symptom | Most Likely Cause | DIY-Safe? | |---|---|---| | Door reverses immediately | Sensor misalignment or obstruction | Yes | | Door goes halfway down, stops | Limit setting or bad roller | Usually | | Remote works, wall button doesn't | Wiring to wall button | Yes | | Wall button works, remote doesn't | Remote battery or programming | Yes | | Door crooked or one cable slack | Broken spring or cable | No — call a tech | | Loud bang, door won't move | Broken spring | No — call a tech | | Door binds in cold weather | Frozen seal or contracted metal | Usually |
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Get It Fixed
If you've worked through these steps and the door still won't close — or if you spotted a broken spring or cable — Square One Garage Doors serves the full Denver metro area and is ready to help.
- Call or text: (303) 994-0375
- Request service online: Contact us
- Learn more about what we repair: Garage Door Repair
Don't leave an open door overnight. Most issues are straightforward to fix once a tech can see what's actually going on.