Repair

Garage Door Sensor Repair and Alignment in Denver

If your door reverses before it closes or the opener lights blink, the safety sensors are the usual cause. G Brothers realigns, repairs, and replaces garage door photo-eye sensors across the Denver metro. It is often one of the quickest and most affordable fixes, and we will not upsell you a part you do not need.

  • Same-day service
  • 4.9 stars, 400+ reviews
  • Licensed & insured

What this service covers

Real work by background-checked local technicians, quoted at a flat rate you approve before anything begins.

  • Sensor alignment

    We square and tighten both photo eyes so the beam lines up and the door closes on the first try.

  • Wiring and sensor repair

    Pinched wires, sun-faded eyes, and failed sensors are diagnosed and repaired or replaced as needed.

  • Full safety-reversal test

    We confirm the door reverses correctly on the beam and on contact, per the safety standard.

Signs of a sensor problem

  • The door starts down then reverses back up

  • One sensor light is off, blinking, or flickering

  • The door only closes if you hold the wall button

  • Sun glare or a bumped bracket knocked a sensor out of line

How it works

  1. 1

    Call or book online

    Tell us the symptom and your door. We schedule a same-day or next-day visit at no charge to look.

  2. 2

    On-site diagnosis and flat quote

    Your technician finds the real cause and gives you a flat price to approve before any work begins.

  3. 3

    Fixed and tested

    We complete the work, cycle and balance the door, and leave it running safely and quietly.

Why homeowners call G Brothers

Voted Best Garage Door Company in Denver, three years running

And rated 4.9 stars across 400+ Google reviews.

More than 40 years of experience

Family-owned, locally operated, and BBB accredited.

Free, no-obligation estimates

We look, diagnose, and quote a flat price you approve before any work starts.

Same-day and 24/7 emergency service

Most repairs are handled the day you call.

Background-checked, licensed, and insured technicians

Local crews you can trust in your home.

No pressure, done right the first time

We recommend a repair over a replacement whenever that is the right call, and back it with a workmanship guarantee.

Reviews

Rated 4.9 across 400+ Google reviews

Denver homeowners and businesses trust G Brothers for fast, honest garage door work.

4.9

Based on 400+ Google reviews

We had a great experience with this garage door company! They responded quickly and came out right away to fix our garage door. The service was fast, professional, and very affordable. Everything is working perfectly now, and we really appreciate how easy they made the whole process. We would definitely use them again in the future and highly recommend them to anyone needing garage door repairs!

Sara Freyta

Google review • Jun 2026

After putting off a broken garage spring for over a year, I finally called G Brothers Garage Doors. I only wish I had done it sooner. I found them on social media and got an immediate response. Scheduling was easy, and Boddrick showed up exactly when he said he would at 8:45 AM. He took one look at the issue and confidently said he could fix it and had the springs in the truck. He replaced both springs quickly for the exact quoted price with no surprises. While testing the door, he noticed noise in the rails and took the time to tune everything up as well. Professional, knowledgeable, efficient, and honest. The kind of service that is hard to find these days. If you need garage door work done right the first time, call G Brothers. No question. Highly Recommend!

David Barnet

Google review • Apr 2026

G Brothers came to check out our garage door issue within a half an hour of calling them. They turned around a quote within that same day and I was able to schedule my garage door opener replacement within 48 hours. This was much faster than I expected (my issue wasn’t an emergency). The garage door works much better now than I knew it could (older garage door). I highly recommend working with G Brothers! And will certainly be going back to them with any future garage door needs.

Kate Henderson

Google review • Apr 2026

I highly recommend this company. They did a great job! I needed a new 2-door and single door garage door and they came the very next day, did a great job, and were the best experience. I've had at least 3 companies come out and do work on my garage doors over the past 10 years and wouldn't use any of them again -- I will be using G Brothers again and again, they did great work at the price they quoted. They were on time, did the work quickly, and it looks and works great!

Jay D

Google review • Oct 2025

So grateful for these guys, they helped me out so quickly and at a great price! When my old door jammed up and got crunched they were the only ones who could within a day fix it and they work so fast it only took them an hour and a half to install a completely new door and springs, great work ethic and super nice guys! Other companies told me it would be weeks till they could get a new door and wanted to charge me thousands more, I would highly recommend these guys to anyone!

Everett McEwan

Google review • Sep 2024

Upfront, flat-rate pricing

Your estimate is free. We diagnose the problem on site, then give you one flat price to approve before any work begins. No surprises, no pressure, and an honest recommendation on whether a repair or a replacement is the better value.

A G Brothers technician servicing a garage door at a Denver-area home

Service Areas

Proudly Serving Lakewood and Surrounding Cities

Based in Lakewood, G Brothers Garage Doors provides same-day garage door service throughout Lakewood, Denver, Arvada, Wheat Ridge, Golden, and surrounding communities.

Lakewood Office

12550 W Colfax Ave, Unit 107, Lakewood, CO 80215

Open 24/7 for emergency garage door service.

FAQ

Related questions

Quick answers about sensor repair and related work from the G Brothers team.

Why is my garage door sensor's green light blinking?

A blinking green light on the receiving sensor means the beam is broken: the sensors are misaligned, blocked, dirty, or have a wiring fault on the sending side.

Read full answer
Are garage door sensors universal or brand-specific?

Garage door sensors are not universal.

Read full answer
Can I bypass my garage door sensors and is it legal?

Permanently disabling garage door sensors is illegal under federal law (16 CFR Part 1211) for any opener made after January 1, 1993.

Read full answer

Ready to get started?

Book same-day service or a free estimate. Serving the Denver metro 24/7.