Wood & steel frame
Sliding driveway gatesFree on-site gate assessment - hinges, posts, and your LiftMaster or Nice gate operator checked before anything is quoted
The assessment is free and the quote is the invoice.
Get your free estimateWhy San Antonio Homeowners Choose DoorKing Gate Repair
DoorKing gate repair in San Antonio costs $185 to $460 for most jobs before parts, and we typically finish slide and swing operator repairs same-day or next-day. We provide San Antonio Doorking service as an independent repair company, and unlike a generic gate company that “sees all brands,” our truck leaves the shop stocked with DoorKing-specific circuit boards, loop detectors, and gearbox components. We are not authorized by or affiliated with DoorKing, and we’ll tell you that straight, but we’ve torn down enough 9150 slide operators and 6500 swing units in this heat to know what fails and why before we even open the gate. Call (361) 314-4803 for a written quote, always before work starts.
San Antonio’s mix of sprawling suburban developments and historic neighborhoods means our techs see everything from a 19th-century wrought iron gate in King William to a modern DoorKing 9150 guarding a driveway off Stone Oak. The heat, humidity, and clay soil here aren’t just conversation topics, they’re the reason your chain tensioner loosens and your loop detector acts up after a thunderstorm. We keep service records on every DoorKing gate we touch, so repeat visits are faster and cheaper for you.
Why Trust Calder Gate Repair San Antonio for Your DoorKing Gate Repair?
Calder Gate Repair San Antonio is the dedicated gate repair specialist inside the Relay Home Co. family, founded in 2009. Every location is independently owned and operated, and ours is led by Nico Alvarez, Owner and Lead Gate Technician. Nico cut his teeth on gate opener schematics at Los Angeles Trade-Technical College, spent his twenties pulling wire and diagnosing motor boards across Southern California, and now runs service calls throughout San Antonio. We know DoorKing equipment well enough to identify a 3-amp control board fuse blown on a 6500 swing operator from the first beep pattern, before we take the rear cover off.
Since 2009, our DoorKing work comes with three guarantees we never soften. You get a written price before any work starts, a written guarantee on every repair, and a free second visit if the repair fails within the 365-Day Done Right Promise window. If the price isn’t in writing, it isn’t real, and you’ll have it in hand before we open a toolbox. We answer calls with a live person 24/7, and every technician arrives background-checked and in uniform, with a trackable arrival time, not a four-hour window.
Styles & brands we work with
Common DoorKing Gate Repair Problems We Fix in San Antonio
- DoorKing 9150 slide operators that jerk or stutter mid-travel. This is one of the most common issues we see across San Antonio, especially on suspended-track installs where clay soil shifts over time. The chain tensioner bolts loosen, the chain develops slack, and the gate moves in lurches. Left alone, the strain travels back to the motor coupling and you’re looking at a much bigger bill.
- DoorKing 6500 swing gates that sag at the hinge post and blow the control board fuse. Years of San Antonio thermal expansion cause the gate frame to drift. The operator then strains to move a gate it wasn’t designed to fight, the amp draw climbs, and the 3-amp fuse under the rear cover pops. If you replace the fuse without fixing the hinge geometry, it’ll blow again in a week.
- Loop detectors that fail after heavy rain. San Antonio thunderstorms saturate the ground around driveway loops, and a compromised loop seal lets moisture in. The detector reads a phantom vehicle, so your DoorKing gate reverses or refuses to close even when the driveway is clear. We diagnose the loop itself, not just the detector board.
- DoorKing 1601-081 keypads with dead keys. Between spring oak pollen and summer dust, membrane switches on these entry systems get gummed up fast. Entry codes stop registering, and you’re stuck using the remote or getting out of the car. We clean or replace the membrane and test every key before we leave.
- DoorKing 1812 Classic telephone entry systems that won’t ring through. These units rely on a clean phone line or cellular connection. After storms or utility work, the relay can lock up or the programming drifts. We reprogram, test from a cell phone, and confirm the gate actually cycles on command.
DoorKing Parts & Our Repair-vs-Replace Approach
We stock OEM DoorKing circuit boards, transformers, and gearbox components on our San Antonio trucks so we can finish most jobs in one visit. For non-critical parts like batteries, remotes, and edge sensors, we offer quality aftermarket equivalents that match the manufacturer specs, and we’ll tell you which is which before we install anything.
Here’s how we decide repair versus replace. If the gearbox and limit switches are still within tolerance, we repair. A full motor replacement is the last option, not the first, and you’ll get a straight cost breakdown either way. OEM parts keep your DoorKing warranty intact on covered components, and we prefer them for anything that touches the control board or motor. For a 9150 with a failed direct-drive coupling, the math usually favors repair. For a 6500 with a seized gearbox and a burned board, we’ll show you both numbers and let you decide. Call (361) 314-4803 and we’ll give you a written price before anything gets unbolted.
Our DoorKing Service Process – Step by Step
- 1
Diagnosis. We start by listening to your DoorKing unit: beep patterns, motor strain, limit switch behavior. We check the loop detector with a multi-meter and test the open/close limits manually before touching anything. You get a written diagnosis and price before work begins.
- 2
Repair or installation. For 9150 slide operators, we re-tension chains, replace couplings, and recalibrate limits so the gate clears the pedestrian path without slamming. For 6500 swing units, we correct hinge-post sag before swapping any board, so the fix lasts.
- 3
Testing. We cycle the gate 10 to 15 times under load, trip the safety edges, and verify the loop detector responds correctly. Every DoorKing job includes a written record of what we found, what we replaced, and the part numbers.
- 4
Warranty. Your repair is covered by the 365-Day Done Right Promise. If the same issue returns within 365 days, we come back at no charge. That’s triggered by the written guarantee on every job, not by a promise made over the phone.
See the difference
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AfterDoorKing Products We Service & Install in San Antonio
Our San Antonio crews service and install the full range of DoorKing residential and light-commercial equipment. That includes the DoorKing 9150 Vehicular Slide Gate Operator, the 6500 Vehicular Swing Gate Operator, the 1601-081 Phone Entry System, and the 1812 Classic Telephone Entry. We also handle older DoorKing slide and swing models that have been discontinued but still sit on a lot of San Antonio driveways. We stock common OEM boards, loop detectors, and gearbox components locally, so we’re not waiting on a freight shipment from California while your gate hangs open.
We Also Service These Brands
DoorKing is what this page is about, but Gate Repair across all brands is what we do. Calder Gate Repair San Antonio is factory-familiar with nine major gate opener brands, including LiftMaster, Mighty Mule, and Ghost Controls. If your property has a mixed setup, a DoorKing operator on one gate and a LiftMaster on the other, one call covers both.
FAQs – DoorKing Gate Repair Service in San Antonio
No, we are an independent DoorKing service provider, not an authorized DoorKing dealer or warranty center. What that means for you: we work on DoorKing equipment every week in San Antonio, we stock OEM parts, and we don’t have to route your repair through a manufacturer approval process. We just fix the gate.
Yes, we use OEM DoorKing boards, transformers, and gearbox components whenever available, because those parts preserve your warranty coverage on covered components. For non-critical items like batteries, remotes, and edge sensors, we offer quality aftermarket equivalents that match door specs. We’ll tell you which is which before you pay for anything.
Most DoorKing slide and swing operator repairs in San Antonio are done same-day or next-day, assuming we have the part on the truck, which we usually do for common 9150 and 6500 failures. Intercom integration or full phone entry system replacement can take a little longer if we need to pull new wiring. Call (361) 314-4803 and we’ll give you a realistic timeline based on your model and symptom.
We service and install the DoorKing 9150 slide operator, the 6500 swing operator, the 1601-081 phone entry system, and the 1812 Classic telephone entry. We also work on older or discontinued DoorKing models that are still running on San Antonio properties. If you have the model number from the silver tag on the housing, we can tell you over the phone whether we cover it.
No, independent service does not void a DoorKing warranty for covered components. We use OEM parts on anything that touches the board or motor, and we document every job with part numbers. If your unit is still under warranty, keep your records, and we’ll help you understand what’s covered and what isn’t before any work begins.
Most DoorKing gate repairs in San Antonio run between $185 and $460 before parts. A loose chain tension, limit switch calibration, or keypad membrane replacement sits on the lower end. A failed coupling, blown control board, or sagging hinge post repair sits higher. You always get a written price before any work starts, and it’s the number you pay, not a starting estimate. Call (361) 314-4803 for an exact quote, and estimates are free.
In most San Antonio cases, this is a failing loop detector or a compromised loop seal, not a motor problem. The gate thinks a vehicle is still over the loop, so it refuses to close as a safety response. We diagnose the loop itself with a multi-meter, and we know which faults in this climate tend to be moisture-related versus board-related.
Yes, we integrate DoorKing 1601-081 keypads and 1812 telephone entry systems with existing 9150 slide operators. We handle the power run, the relay wiring, and the programming, and we test from a cell phone before we leave. Call (361) 314-4803 and we’ll scope it out with a written price.
Three beeps on a DoorKing 6500 swing operator typically signals a control board fault, often the 3-amp fuse under the rear cover has blown from excess amp draw. The root cause is frequently hinge-post sag that makes the operator strain. If you swap the fuse without fixing the geometry, three beeps comes right back. Let us diagnose it properly.
Random opening on a DoorKing system is almost always phantom loop activation or a failing receiver picking up stray frequency interference. In San Antonio, a saturated loop seal after storms is the most common culprit we find. We isolate the source before selling you any parts.
Yes, we repair DoorKing gates installed by anyone, including previous owners. We’ve worked on plenty of San Antonio properties where the gate “worked fine” for fifteen years, which usually means it closed most of the time. If you’re not sure what model you have, send us a photo or read us the tag, and we’ll tell you what we’re dealing with.
Book Your DoorKing Service in San Antonio, TX
Call (361) 314-4803 and a live person answers, 24/7. We’ll set a trackable arrival time, show up in uniform, and put your DoorKing gate repair price in writing before any work starts. We’re the San Antonio gate company with the 365-Day Done Right Promise and a written guarantee on every job, so if it isn’t right, we return at no charge. Let’s get your gate closing again.
Written by Nico Alvarez, Owner & Lead Gate Technician at Calder Gate Repair San Antonio, serving San Antonio since 2009.