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
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
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
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.
Based on 400+ Google reviews
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.

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.
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 answerAre garage door sensors universal or brand-specific?
Garage door sensors are not universal.
Read full answerCan 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 answerRelated services
Ready to get started?
Book same-day service or a free estimate. Serving the Denver metro 24/7.
