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Get your free estimateMighty Mule Electric Gate Repair in San Antonio: What to Know First
Mighty Mule electric gate repair in San Antonio typically runs between $185 and $520 depending on whether we’re replacing a control board, swapping an actuator arm, or rewiring a sensor loop. Most Mighty Mule jobs are completed same-day or within one business day, and you’ll always get a written price before any work starts. If you own a Mighty Mule gate opener and it’s clicking but not moving, beeping without opening, or the keypad stopped responding, this page tells you exactly what’s going on and what it should cost to fix. Call (325) 252-5195 and a live person answers, any hour, any day.

How Mighty Mule Products Fail – and How We Fix Them
- MM360 and MM371 actuator arms seizing after monsoon season. San Antonio’s limestone dust and summer humidity work their way into the actuator tube where the worm gear lives. The gate moves slower each week, then stops mid-swing. We disassemble the arm, clean the gear thread, re-lubricate with a marine-grade grease that holds up in Texas heat, and reseal the housing. Most arms don’t need replacing; they need the grit removed.
- FM200 control boards that beep twice but never engage the motor. That double-beep is the board telling you it sees a fault in the safety circuit, not a dead motor. In San Antonio we see this most often after hard rains when moisture gets into the photo eye connectors at the gate post. We dry and reseal the JST connectors, test the photo eye alignment, and the board usually comes back without needing a replacement part.
- Mighty Mule keypads (MMKPM and MMS100) dead after summer heat. The rubber membrane on Mighty Mule keypads hardens and cracks under direct sun, which is nearly every unshaded gate in San Antonio. Water gets behind the membrane and corrodes the contact traces. We replace the keypad with a factory Mighty Mule unit or a compatible aftermarket keypad with better UV sealing, then reset the entry code and test from inside and outside the gate.
- Remote controls (FM135, FM137) that work from 10 feet but not from the street. This is rarely a remote problem. Mighty Mule receivers use a small antenna wire tucked inside the control box, and in San Antonio’s oak-heavy lots that antenna picks up interference from overhead power lines and neighboring gate systems. We relocate the antenna, add a ground plane if needed, and the range usually doubles. If the remote board is genuinely failing, replacements are stocked on the truck.
- Solar-powered Mighty Mule systems (MM560 and MM562) draining overnight. San Antonio’s intense sun is good for solar, but the lead-acid batteries Mighty Mule ships with are not well matched to our heat. They cook in the first two summers and the gate opens fine all day, then fails at 6 a.m. when the battery hasn’t recovered. We swap in a heat-rated sealed AGM battery and check the solar panel angle for maximum winter sun, which is the weaker season here.
Styles & brands we work with





Our Mighty Mule Electric Gate Repair Process
- 1
You call, a person answers. We ask what the gate is doing, what model opener you have, and whether it’s making any sound at all. That tells us a lot before we even load the truck.
- 2
We diagnose on site, not over the phone. A Latch and Post technician tests the transformer output, the battery voltage, and the board’s fault light sequence. We write down the model number and service date so you have a record.
- 3
We show you the written price before any parts come out of the truck. No exceptions. If it’s a ol2 limit switch, the bill says ol2 plus labor. If it’s a ol85 control board, you know that number before we unbox it.
- 4
We make the repair. Most Mighty Mule parts are stocked on our trucks because San Antonio homes lean heavily on this brand. If we need something specific, we tell you when it arrives and when we’ll be back.
- 5
We test the full cycle: open, close, auto-reverse, safety sensors, keypad, remotes. Then we run it again with the gate under load, not just free-swinging. That’s the test that catches intermittent failures.
- 6
We clean up like it’s our own home. Shoe covers on, drop cloths down, a photo of the cleanup before we leave. Every Mighty Mule repair carries the 365-Day Done Right Promise.
See the difference
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After
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After
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AfterWhat Mighty Mule Electric Gate Repair Costs in San Antonio
Here’s straight dollar context for the most common Mighty Mule repairs we handle across San Antonio neighborhoods from Stone Oak to Alamo Ranch:
- Actuator arm rebuild (cleaning and reseal, no new parts): $165 – $240
- Control board replacement (single-arm MM360 or MM371): $285 – $520
- Keypad replacement with reprogramming: $120 – $185
- Remote receiver or antenna repair: $95 – $180
- Safety sensor realignment or replacement: $110 – $260
- Full diagnostic visit (applied toward any repair you approve): $65 – $95
What moves the price is access: a gate set 200 feet back from the house with buried conduit costs more in labor than a driveway gate next to the garage. The written estimate covers everything before we start, so there’s no after-the-fact surprise. Call (325) 252-5195 for the exact number on your gate.
Why San Antonio Homeowners Call Latch and Post Gate Repair San Antonio for Mighty Mule Work
We’re an independent Mighty Mule service provider, which means we’re not tied to the manufacturer’s parts catalog or their service network. We decide what’s actually best for your gate. Most days that means genuine Mighty Mule parts; occasionally it means a better-built aftermarket part, like a sealed actuator bearing that outlasts the OEM version in San Antonio heat. We also work on LiftMaster, Ghost Controls, and DoorKing systems, so when a customer has a Mighty Mule on the front gate and a Ghost Controls on the side yard, one visit handles both. Every technician is background-checked and uniformed. We put shoe covers on before we walk through your house to the gate panel, and we use pet-safe lubricants where there’s a choice. If your kids are napping, we can do the quiet work first and test the gate after they wake up. The 365-Day Done Right Promise covers every Mighty Mule repair we do: if the fix doesn’t hold, we make it right. No argument, no fine print.
FAQs
Yes, most Mighty Mule electric gate repairs in San Antonio are completed same-day or next-day. We keep common Mighty Mule parts stocked on our trucks, including actuators, control boards, and keypads. Call (325) 252-5195 in the morning and we’ll tell you honestly whether your job is a same-day fix or needs a part ordered.
Yes. Mighty Mule discontinued the MM360 line but replacement arms, boards, and keypads are still available through aftermarket suppliers, and some genuine OEM stock remains in distribution. We source from both channels and tell you which part we’re using and what it costs before we install anything. Call us with your model number and we’ll check availability while you’re on the phone.
If the control board and actuator both failed on a 10-plus-year-old MM360, you’re looking at $500 to $700 in repairs, at which point a new opener makes more sense. If it’s just the keypad or a sensor, repair is usually the clear call. We’ll run the numbers in writing and let you decide, with no pressure either way.
Independent repair on a Mighty Mule system using genuine parts does not automatically void the manufacturer’s warranty, and for older units the warranty has typically expired anyway. We note every part number and service date on your invoice so you have a factory-ready record if a warranty claim ever comes up.
We answer calls 24 hours a day, and we’ll give you a real arrival window on the phone. If the gate is stuck open, we can walk you through safely disengaging the actuator so you can close the gate manually until we arrive, which keeps your driveway and your dogs secure in the meantime. Call (325) 252-5195.
Written by Cody Beckman, Owner, Latch and Post Gate Repair San Antonio at Latch and Post Gate Repair San Antonio, serving San Antonio and nearby areas. Every gate comes down to two parts – the latch that holds it and the post that carries it. Get it right once, and you won’t have to think about it again.