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Get your free estimateMighty Mule Gate Repair in Fontana, CA | Lexington Gate Repair
We provide independent Mighty Mule gate repair across Fontana and nearby areas like Mighty Mule in Pedley, and most calls are diagnosed and fixed the same day. What makes our work here different is simple: Fontana sits at the mouth of the Cajon Pass, and Santa Ana winds push gate leaves out of square in ways you won’t see in hill-shielded cities. If your Mighty Mule operator is stalling, reversing, or throwing limit errors, call (866) 304-1321 and we’ll tell you what’s likely wrong before we even roll the truck.
Why Fontana Residents Choose Us for Mighty Mule Service
We work on Mighty Mule operators every week: the MM560, the MMS100 series slide operators, the FM700 and FM500 swing units, and the solar and battery-backup kits people rely on when they’re off grid or tired of rewiring. Our Mighty Mule sales & service knowledge runs deep because we’re a gate-only shop. We’re not a handyman picking up a gate job between fence posts and garage doors. Nelson Arquette, our owner, grew up off Eucalyptus Avenue near the old Chino Fairgrounds and spent years in electrical and industrial troubleshooting before focusing exclusively on gate systems. That background matters when a control board is sending voltage to a motor that isn’t turning.
Across Fontana, from the mid-century tract homes in 92335 to the newer developments in 92336, we show up with the right boards, arms, limit switches, and hardware on the truck. We’re independent: not authorized, sponsored, or endorsed by Mighty Mule. We also service LiftMaster, Ghost Controls, and DoorKing on the same rig, so if your Mighty Mule turns out to be beyond repair, we can quote a replacement operator without you having to call a second company.
Styles & brands we work with





Common Mighty Mule Gate Repair Problems We Solve in Fontana
- Wind-racked swing gates stalling the MM560. Cajon Pass gusts push the gate leaf out of square, so the operator fights the hinge instead of the load. The arm attachment bends or the motor stalls mid-travel. We true the gate, re-set the arm mount, and re-tune the limits.
- Dust-packed slide rollers on MMS100 operators. Wind-driven grit from the pass fills the track and binds the rollers, which trips the obstruction sensing and sends the gate reversing for no visible reason. We clean and re-lube the track, replace worn rollers, and check the entrapment settings.
- Battery and solar-harness failures. A sealed cell cooked by Fontana summer heat won’t hold enough charge to move the gate, but the control board still reads it as full. We test the actual load capacity, not just voltage, then replace with quality aftermarket cells where the OEM part is overpriced or discontinued.
- Limit-switch and control-board faults on older single-arm units. Years of vibration on block-wall-mounted posts that have settled or been knocked out of plumb wear these boards out. We check the post first: if it’s shifted, replacing the board without fixing the post just burns the new part out faster.
- Hinge and post failures on original southwest Fontana gates. Older homes near the historic downtown often have manual swing gates on posts set decades ago. Wind and settling have pulled them out of plumb, so the gate racks and the opener works against itself. We re-set posts, replace hinges, and realign before touching the operator.
Mighty Mule Service in Fontana: What Local Conditions Mean for Your Equipment
Fontana’s position at the mouth of the Cajon Pass means Santa Ana winds hit the older southwest tract homes and block-wall gate frames harder than anywhere hill-shielded. A Mighty Mule arm that holds its tune in Chino or Mighty Mule in Rialto will have its mount and limit settings pushed out of whack here within a season. Wind hits the gate leaf like a lever, and if the hinges or posts have any play, all that force lands on the operator arm and the limit switches. On top of that, many southwest Fontana gates hang on original posts that decades of wind and settling have knocked out of plumb, so realignment often means re-setting the post before the operator can be tuned. We see this on streets off the historic downtown grid constantly: the gate looks fine until you put a level on it, and then the whole story shows up in the gaps.
Mighty Mule Models & Products We Service in Fontana
We service the MM560 single-arm swing opener, the MMS100 and MMS100U slide operator series, the FM700 and FM500 swing units, and Mighty Mule solar and battery-backup accessory kits. Our parts approach: we stock genuine Mighty Mule control boards, arms, and limit switches, and we use quality aftermarket batteries, rollers, and hardware where the OEM part is overkill or no longer made. On a unit with a sound operator and a wind-bent gate, we fix the gate and hardware first. We only steer owners toward replacement when the control board and motor are both gone or the frame is rusted through. That keeps Fontana turnaround fast: the parts for most Mighty Mule repairs are on the truck or one local supply run away.
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AfterMighty Mule Service Pricing in Fontana
Most Mighty Mule repairs in Fontana land between $180 and $340 for common board, limit switch, and realignment work, with slide operator roller and track service running $150 to $275. Control board replacement, depending on the model and whether the arm and limits need re-tuning afterward, typically runs $250 to $450. Full operator replacement with a new arm and hardware starts around $650 and goes up from there based on gate size and power access. The real cost driver in Fontana is the gate itself: if the posts are out of plumb or the leaf is racked, the repair includes realignment, and that’s part of the quote we write up front. Every price is agreed before any work starts. Call (866) 304-1321 for a free estimate on your specific gate.
Serving Fontana, CA — Our Local Coverage Area
We’re based in the Fontana area and know this community well, including Mighty Mule in Glen Avon. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Mighty Mule Gate Repair in Fontana
Usually not. In Fontana, wind gusts through the Cajon Pass push the gate leaf out of square, and the operator stalls because it’s fighting a bind at the hinge or arm mount, not because the motor died. We check the gate geometry and post plumb before we condemn the opener. Call (866) 304-1321 and we’ll walk you through a quick test over the phone.
Wind-driven dust and grit from the pass pack into the track and roller bearings. The rollers seize, the obstruction sensing trips, and the gate reverses or stops. We clean the track, replace worn rollers, and set the entrapment sensitivity correctly. If it keeps happening, we’ll quote a roller-and-track upgrade that handles the grit better.
Yes. We test the full load capacity of the battery, not just the resting voltage, because a cell cooked by Fontana summer heat can read charged while holding almost nothing. We also check the solar harness connections and charge controller. We stock quality aftermarket batteries and can source Mighty Mule panels when the existing one is damaged.
Yes. We install keypads, intercoms, and vehicle exit sensors on existing Mighty Mule swing and slide systems. The work depends on your operator’s control board and whether it has an open accessory input. We’ll check the board revision and tell you what’s compatible before you buy anything.
If the operator is still running and the post is sound, we repair: re-set the post if it’s shifted, true the gate leaf, and re-tune the arm and limits. If the post is rusted through at the base or the gate frame is failing, replacement makes more sense, and we’ll show you the math on both options before you spend a dollar. Call (866) 304-1321 for a straight answer.
Service Areas Near Fontana
We cover all of Fontana plus the surrounding area. Our Fontana service area includes Chino, Ontario, Montclair, Pomona, and Claremont. If you’re just over the line, we likely already have a truck in your neighborhood. For reference, we also provide Mighty Mule service in La Habra and Mighty Mule service in Rubidoux.
Book Your Mighty Mule Service in Fontana Today
If your Mighty Mule gate is stalling, reversing, or dead on the post, call (866) 304-1321. We’ll diagnose it over the phone when we can, schedule same-day service when the calendar allows, and quote every price before work begins. Nelson Arquette and the Lexington Gate Repair team know Mighty Mule, offer Mighty Mule repair in Bloomington, and we know Fontana wind.
Written by Nelson Arquette, Owner at Lexington Gate Repair, serving Fontana and the Inland Empire.