Photo-eye safety sensor installation, alignment, and replacement. Required by UL-325 safety code — we test auto-reverse and verify the door stops on a 1.5-inch obstruction.
San Francisco garage door sensor installation, done by a crew that works this area daily. We see seized hinges and rollers from persistent damp, rusted bottom brackets on bay-facing garages, and intermittent openers tripped by moisture in the wiring most often here, and we carry the parts to resolve them on the first visit.
Because San Francisco has a cool maritime climate shaped by bay fog and the marine layer, with mild temperatures but heavy seasonal moisture, the doors here age differently than inland or coastal homes elsewhere. The usual culprits are high humidity that swells wood doors and seizes hinges and persistent bay fog and damp air that corrode unprotected hardware — exactly what our techs come prepared for.
San Francisco homeowners usually call us about one of a few things: seized hinges and rollers from persistent damp, rusted bottom brackets on bay-facing garages, and intermittent openers tripped by moisture in the wiring. We diagnose the real cause — not just the symptom — before quoting a flat rate.
Photo-eye safety sensors are required by UL-325 on every garage door opener manufactured since 1993. They detect obstructions in the door's path and either reverse the door (during close) or refuse to start (when activated). When sensors are misaligned, dirty, sun-blinded, or failed, the door either refuses to close at all or — worse — closes without sensing an obstruction. Our sensor installation service replaces failed sensors, realigns drifted brackets, cleans the eye optics, and verifies auto-reverse on a real obstruction test.
Replacement eyes are brand-specific (LiftMaster has a different connector and signal pattern than Genie). We stock the major brands and most legacy models. Brackets occasionally need replacement when corrosion has degraded them or impact has bent them. Bracket alignment is critical — eyes that are slightly off-aim trigger intermittent close failures that drive homeowners crazy.
Every visit ends with an obstruction test: a 1.5-inch (3.8 cm) tall object placed under the door at three positions across the opening. The door must reverse when it touches the object. This is the UL-325 baseline — if the door doesn't pass, the install isn't complete. We document the test results on the work order.
Photo-eye electronics fail at 10–15 years. Replacement is inexpensive and quick.
Our process
1
Call or schedule online.Pick a 2-hour window. We confirm in under 5 minutes with the assigned tech's name and photo.
2
On-site diagnosis. Free for most repairs; $39 diagnostic on minor service calls (waived if you proceed). You see the issue and the fix before we start.
3
Flat-rate quote. Written estimate before any work. No hourly creep, no upsell pressure — techs are salaried, not commissioned.
4
Same-visit fix. 96% first-call fix rate. We test the door with you before leaving and clean up everything we touched.
Pricing & financing
Garage Door Sensor Installation starts at from $99. Every quote is flat-rate and presented in writing before work begins — there are no surprise add-ons or hourly creep. Senior (65+) and military discounts of 10% off labor apply to all residential work. Financing through Synchrony is available on projects over $1,500 at 0% APR for the first 12 months, with same-day approval and no prepayment penalty.
Why homeowners in San Francisco, CA choose us for garage door sensor installation
In San Francisco, garage door sensor installation done right means a local, licensed crew that understands San Francisco County's housing and climate. That's us — CSLB #1098234, 24/7 dispatch, 96% first-call fixes, and no surprise add-ons.
The garage door sensor installationworkmanship guarantee is 10 years — separate from any manufacturer warranty on the parts themselves. If the install or repair we performed fails because of how we installed it, we return and fix it at no charge for a full decade. Springs rated for 30,000 cycles carry a lifetime warranty for the original homeowner. Parts and accessories carry standard 1–5 year warranties depending on the item; we'll explain exactly what's covered before we start any work, in writing.
Honest sizing and honest scope are the two principles that drive how we quote garage door sensor installation. We don't up-sell unnecessary work, our techs are salaried (not commissioned), and the diagnostic is structured so you see exactly what we see — including the parts that are still in great shape and don't need attention. If a repair is the right call, we recommend the repair. If replacement is the better long-term economics, we say so. Either way, the quote is flat-rate, written, and good for 30 days so you can compare and decide on your own timeline.
Areas we serve for garage door sensor installation
We provide garage door sensor installation throughout San Francisco, CA and the surrounding San Francisco County area. Serving Mission, Sunset, Richmond and surrounding neighborhoods. Coastal air around San Francisco accelerates spring and hardware corrosion — we fit galvanized hardware and high-cycle springs to compensate.
We're proud to serve San Francisco County: San Francisco is California's only consolidated city-county, a dense 47-square-mile peninsula tip ringed by water on three sides. San Francisco homeowners get the same licensed, insured, guaranteed service as every community we cover here.
Our San Francisco County footprint puts San Francisco at the center and Oakland, Fremont, San Jose, and Stockton within easy reach. One number reaches a local tech for any of them, 24/7.
We cover ZIP codes 94110, 94114, 94117, 94121, 94122, 94131 and the surrounding area. Reach times vary by traffic and time of day; we'll quote an accurate ETA when you call. Our dispatch line is open 24/7 and routes directly to an on-call technician — there's no voicemail system between you and the person who'll be solving your problem.
Frequently asked about garage door sensor installation
Top questions homeowners ask us about this service:
UL-325 has required them on residential openers since 1993. California Mechanical Code and CSLB enforcement both reference UL-325. Older openers without photo-eyes are non-compliant when replaced.
Yes for matching same-brand same-generation replacements — relatively straightforward. Cross-brand replacements often don't work due to signal differences. Our flat-rate is $99–$149 installed.
Realignment: 15–30 minutes. Sensor replacement: 30–60 minutes. Full retrofit on an older opener: 60–90 minutes.
1-year manufacturer warranty on replacement sensors; 10-year workmanship on the install.
Same-brand same-generation: yes. Different generation: sometimes, depends on the model. Different brand: rarely. We match generation when ordering.