Garage Door Sensor & Keypad Repair in San Antonio, TX
Door opens but won't close? Sensor light blinking? Keypad dead? Here are the safe checks to try first, what a sensor or keypad repair usually involves, and how to get quotes from local garage door companies in San Antonio, Texas.
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Signs of a sensor or keypad problem
Sensor trouble usually shows up as a door that opens normally but won't go back down.
- The door reverses partway down for no clear reason
- It closes only while you hold the wall button
- A sensor light is blinking or off
- It happens at the same time each afternoon
- A sensor bracket is bent or the wire is loose
- The keypad doesn't respond, or works only sometimes
- The remote works but the keypad doesn't
San Antonio Garage Door Experts is a free quote-matching service, not a garage door company. You describe the problem once, independent local garage door companies reply with quotes, and the company you choose does the work. Companies may pay to receive requests.
Safe checks before you request quotes
These checks are safe and solve many sensor problems:
- Clear the beam path: bins, boxes, bikes, a broom or even a hanging strap can block it
- Wipe both lenses with a soft, dry cloth; dust, cobwebs and wasp nests are common
- Check the sensor lights; on many openers, steady lights on both sides mean the sensors see each other
- Look for a bumped sensor and gently point both back at each other
- Follow the wire for loose staples, chew marks or a pinched spot, without cutting or splicing anything
- For a keypad, replace the battery and check that the opener's lock or vacation mode is off
If the door still won't close, don't tape the sensors together or move them up the wall. Holding the wall button to force the door down should be a short-term workaround only, and only while you watch the whole opening. For more causes, see garage door won't close all the way and why is my garage door opener light blinking?
What a technician typically does
Methods vary by company and opener brand. A sensor or keypad visit usually covers these steps.
1. Check alignment
Both photo eyes are checked for height, angle and a clear line across the opening.
2. Test the wiring
The low-voltage wire from each sensor to the opener is traced for breaks, shorts and loose terminals.
3. Replace parts if needed
A failed sensor pair, bracket or keypad is replaced with parts compatible with your opener.
4. Reprogram
A new keypad or remote is paired to the opener, and travel limits and force settings are checked.
5. Safety test
The auto-reverse is tested with an object on the floor and the photo eyes with a break in the beam.
Sun, heat and storms in San Antonio
Low sun and photo eyes
Low afternoon sun can shine into a photo eye and keep the door from closing. West-facing garages are the usual suspects, and the problem may come and go with the seasons as the sun angle changes. A company can sometimes swap which side the sending and receiving sensors sit on, or fit a sun shield made for your opener brand.
Heat
San Antonio averages about 122 days a year at 90°F or hotter and about 18 at 100°F (NOAA 1991–2020 normals), and 2023 set a record with 75 days at 100°F or more (National Weather Service). Long hot spells can be hard on plastic housings and outdoor keypads, though how much heat shortens their life is not well documented. Many openers also have a thermal overload that can stop the motor when it overheats, which can look like a sensor problem but isn't. If the opener itself is the issue, see opener repair.
Storms and outages
Wind-driven rain can get into an outdoor keypad, and a power surge or outage can leave an opener that needs its remotes and keypad re-paired. During long outages, like February 2021, an opener without battery backup won't lift the door; know where your manual release is, and pull it only with the door closed.
Older openers
The median home in San Antonio was built in 1985 (Census ACS 2020–2024), so some garages still have openers from around the time photo eyes became standard. If an opener is old enough that matching sensors are hard to find, a company may suggest replacing the opener rather than the sensors.
What sensor and keypad repairs cost
The published guides don't list sensors or keypads as their own line. They fall under opener repair.
| Item | Typical range | Source |
|---|---|---|
| Opener repair | $100–$300 | Fixr, Jan 2025 |
| Opener, installed | $300–$600 (avg ≈ $480) | Fixr, Jan 2025 |
| Service call / trip fee | $50–$75 | Fixr, Jan 2025 |
| After-hours or emergency surcharge | +$100–$300 | Fixr, Jan 2025 |
Published national estimates, not quotes (Fixr, Jan 2025). San Antonio-area quotes vary.
A realignment or a cleaned lens may cost little more than the trip fee. A new sensor pair, new wiring or a new keypad costs more, and a full opener replacement is a different job. The San Antonio cost guide has the full table and a calculator.
Safety and when it is urgent
Openers made since Jan 1, 1993 must reverse within 2 seconds of touching an obstruction and have secondary entrapment protection such as photo eyes (16 CFR 1211). Test the auto-reverse monthly. To test, place a roll of paper towels or a board flat on the floor under the door and close it; the door should reverse on contact. Then wave something through the photo-eye beam while it closes; it should stop and reverse.
Never bypass or remove photo eyes to get a door to close. Torsion springs store enough energy to cause serious injury. Leave spring and cable work to a trained technician.
When it is urgent
A door that won't close at night or before you leave is worth treating as urgent; see emergency garage door repair. A door that closes but reverses only once in a while can usually wait for a scheduled visit.
Questions to ask the companies that reply
- Is the estimate in writing, with the trip fee shown?
- Are the replacement sensors or keypad made for my opener brand and model?
- Will you test auto-reverse and the photo eyes before you leave?
- Is the opener itself worth keeping, or is it near the end of its life?
- What are the warranty terms on parts and labor, in writing?
- If a new outlet is needed, will a licensed electrician do it?
- Is your company registered with the City of San Antonio where that applies?
Texas doesn't license garage door companies (TDLR has no garage door program). New outlets or circuits for an opener are electrical work for a licensed electrician. Inside San Antonio, the city says contractors register with Development Services before permits are issued (DSD, 210-207-1111).
Sensor and keypad repair FAQ
Why won't my garage door close but it opens fine?
A blocked, dirty or misaligned photo eye is a common cause. The opener reverses or refuses to close when the sensors can't see each other. Clear the path, wipe both lenses and check that neither sensor was bumped. If the problem happens only in late afternoon, low sun shining into a sensor may be the reason.
Why is my garage door sensor light blinking?
On many openers, a blinking or off sensor light means the two photo eyes are not lined up or something is blocking the beam. A damaged wire can do the same. Light patterns differ by brand, so check your opener's manual. If cleaning and realigning don't help, a company can test the sensors and wiring.
Can I just disconnect the garage door sensors?
No. Photo eyes are a safety device. Openers made since Jan 1, 1993 must reverse within 2 seconds of touching an obstruction and have secondary entrapment protection such as photo eyes (16 CFR 1211). Disabling them removes protection for children, pets and cars. Fix or replace them instead.
Why did my garage door keypad stop working?
Start with a new battery. If the keypad still doesn't respond, it may need to be reprogrammed to the opener, or the opener may have a lock or vacation mode turned on. A cracked or water-damaged keypad usually needs replacing. Check that the keypad is compatible with your opener brand before buying one.
Get sensor and keypad repair quotes in San Antonio, TX
Tell companies what the door does, what the sensor lights show, your opener brand if you know it, and whether the problem happens at a certain time of day.
Garage door stuck, loud or off track? Get free quotes.
Describe the problem once and independent garage door companies serving San Antonio and nearby suburbs can reply with no-obligation quotes.