Linear Gate Motor Replacement Nationwide

Linear Gate Motor Replacement: The Alpharetta Owner’s Guide

Most Linear gate motor replacements we install in Alpharetta run between $680 and $1,450 for a complete unit swap, depending on whether we’re working with a single swing arm, a dual swing setup, or a slide gate operator. We stock Linear-compatible motors and mounting hardware on every service truck, and we can typically diagnose and quote the replacement same day. Homeowners usually notice the problem first as a humming motor that won’t budge the gate, or a gate that moves six inches and quits.

Call (678) 679-2152

Which Linear Models This Applies To

Linear gate motors cover three main residential and light-commercial lines you’re likely to find on Alpharetta properties: the Linear PRO Access swing-gate series (models like the SW33, SW44, and SW49), the Linear SL slide-gate operators (SLC100, SLC200, and the heavier-duty SLC500), and the older Linear HSLG and MLSG legacy units still running on gates installed in the early 2010s.

To identify your exact motor, look for the white or silver specification label on the operator housing, usually on the motor cap or the underside of the control box. You’ll need the model number and the manufacture date, because Linear changed its control-board footprint twice in the last decade. The 2017-and-later PRO Access boards are not backward-compatible with pre-2017 enclosures without a bracket adapter.

We carry both OEM Linear replacement motors and quality aftermarket equivalents from US Automatic and Elite that match Linear’s bolt patterns and voltage specs. For most Alpharetta residential gates under 18 feet and 800 pounds, an aftermarket equivalent carries the same torque rating at roughly 15% lower cost. For commercial-grade cycles or gates over 1,200 pounds, we recommend sticking with OEM Linear to preserve the factory duty-cycle rating.

Signs Your Linear Gate Motor Replacement Is Failing

• The motor hums but the gate doesn’t move. This usually means the start capacitor has failed or the armature is seized. On Linear slide operators, we also see this when the drive chain has jumped a sprocket and the motor is spinning against a mechanical lock.
• The gate moves a few inches, then reverses or stops dead. The limit switch is either misreading position or the motor’s thermal overload is tripping from internal winding damage. In Alpharetta’s summer heat, thermal failure is more common than in cooler climates because the motor housing can’t dissipate heat as effectively.
• Intermittent operation that gets worse on hot afternoons. This is almost always winding insulation breaking down. The motor draws more current as it heats, eventually pulling enough to trip the board’s overload protection. We log the amperage draw cold versus hot to confirm before quoting replacement.
• Grinding or clicking from the gear housing, with visible metal debris on the cover plate. The worm gear or output shaft bearings have failed. On Linear units, the bronze worm gear is sacrificial and designed to fail before the motor itself, but owners often run it long enough to take the motor with it.
• The gate operates fine manually but not on motor power, even with a new control board. The motor’s internal centrifugal switch or run capacitor has failed. We’ve traced this on three separate jobs near Windward Parkway where a previous technician replaced the board twice without checking the motor’s auxiliary winding circuit.

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Replacement Cost & What’s Included

These prices include the motor unit, mounting hardware, limit-switch setup, safety-device verification, and disposal of the old unit. What moves the needle: whether the existing arm bracket is reusable, whether the control board also took damage, and whether the gate itself needs post realignment before the new motor can be calibrated correctly.

Under our Haven Standard, you get the written price before we pick up a tool. That price doesn’t change unless you add scope. Every Linear motor replacement carries our 365-Day Done Right Promise, and we document the installed amp draw, limit-switch settings, and safety-edge function with photos before we leave.

DIY or Call Us?

There’s a short list of safe checks any Alpharetta homeowner can make before calling. Verify the breaker hasn’t tripped. Look for obvious obstructions in the gate track or swing path. Check that the photo-eye LEDs are lit and aligned. If the motor hums, listen for where the sound comes from, gear end or electrical end.

Everything past that point involves line voltage, a motor that can weigh 35 to 80 pounds depending on the model, and in the case of slide operators, spring-loaded chain tension that can snap fingers or worse. We don’t recommend DIY motor replacement on any automated gate. The motor must be electrically isolated, mechanically supported during removal, and the limit switches recalibrated to the gate’s actual travel endpoints. Get the calibration wrong and the gate either doesn’t close fully or overtravels and damages the hardware.

If you’re hearing humming, clicking, or intermittent operation, call (678) 679-2152. We’ll diagnose it, name what we found, name what it costs, and name what we left behind.

FAQs