Leviton SureSlide Ceiling Fan Control and Dimmer Switch for LED, Halogen and Incandescent Bulbs, 66DF-10W, White

A wall box doesn’t have to be a junk drawer of mismatched knobs and rockers. I swapped one of my fan/light setups to the Leviton SureSlide and have been living with it long enough to see where it shines and where it stumbles.

What it is and how it’s laid out

The SureSlide combines two controls in a single Decora-style body: a three-speed fan controller on one side and a full-range dimmer on the other. Each has its own slider with a small on/off switch at the bottom. The fan side clicks through low, medium, and high with off at the bottom; the light side is continuously variable and can be set anywhere from a faint glow to full brightness. Labels are clear, and the control separation makes it obvious which slider does what—handy for households with guests or kids.

The unit matches standard designer wallplates and looks clean once dressed with a screwless plate (sold separately). Out of the box it feels well made: the sliders move smoothly, and the detents on the fan side are reassuring without being stiff.

Installation notes

I installed the SureSlide in place of a single-gang combination control that had seen better days. A few practical notes from the job:

• Wiring needs: line/hot in, separate switched leads to the fan motor and the light kit, and ground. There’s no neutral connection to the device itself. If your fan has only a single switched leg feeding both the motor and light, you’ll need to pull an additional conductor or you won’t be able to control them independently.
• Box space: it’s an electronic controller, so it’s deeper than a basic toggle. It still fit my standard metal box with a multi-wire feed, but it was snug. A deeper plastic box would make life easier if you’re doing new work.
• LED setup: there’s a small trim adjustment for setting the minimum light level. I accessed it with a jeweler’s screwdriver after installation. Setting this correctly eliminated most low-end shimmer on my can lights.
• Compatibility: this is a single-pole control. It won’t work in a 3-way or multi-location arrangement. It’s also intended for traditional AC, capacitor-based, three-speed ceiling fans—not DC-motor fans and not fans with built-in remote modules unless you bypass that module. Don’t pair it with smart bulbs; the dimming method isn’t designed for them.

If you’re comfortable swapping switches, this is a straightforward 20–30 minute job. If not, hire an electrician—fan controls can be unforgiving if miswired.

Day-to-day performance

I’ve used the SureSlide with two setups: a 52-inch, three-speed AC fan with a light kit using three 9W dimmable A19 LEDs, and a different fan paired with four 6-inch dimmable recessed LED cans.

• Fan control: Low, medium, and high speeds worked as expected. On my test fans, low was genuinely low without stalling, and high delivered full airflow. What stood out was the lack of hum at low speed; whatever Leviton’s doing in the circuitry to smooth low-speed operation works. The detents make it easy to land on the intended speed without hunting.
• Light dimming: With both sets of LEDs, dimming was smooth through most of the range. Before I set the minimum trim, I could provoke faint shimmer at the very bottom end with the recessed cans. After dialing in the minimum level, that disappeared for normal use. With the A19s, I could get them down to a comfortable night-light level without dropout.
• Interaction between controls: Changing fan speeds didn’t introduce noise into the lights or vice versa in normal operation. If I whipped the fan slider quickly from off to high, I occasionally saw a brief bump in light intensity, but it was momentary and not a real-world issue for me.
• Heat and noise: The face stayed cool, and I didn’t hear any buzzing from the switch itself. The fan motors were quiet on low, which hasn’t always been true with older capacitor-based controllers.
• Feel: The fan slider has nice tactile stops. The light slider on my unit was very light to the touch—easy to adjust precisely, but also easy to nudge accidentally when hitting the off switch. Not a dealbreaker, just something to be aware of if you prefer more resistance.

LED behavior and the minimum trim

Not all “dimmable” LEDs behave identically with forward-phase controls. The trim adjustment is the difference between a good and great experience. Here’s what worked for me:

• Set the lights to the lowest level where they remain stable, then tweak the trim until shimmer disappears.
• Use matched, high-quality dimmable LEDs. Mixing bulb types or brands made the bottom end less consistent in my recessed setup.
• If you still see flicker at low levels after adjustment, raise the minimum slightly and live a little higher on the dimming curve. It’s better than chasing the last 5% and fighting artifacts.

In short, the SureSlide’s LED-friendly design is effective, but it can’t fix poor LED driver behavior. Pair it with decent bulbs and spend two minutes on the trim and you’ll be happy.

What I like

• Clean, consolidated control: One gang, two independent sliders. Frees up wall space and looks organized.
• Quiet low-speed fan operation: My fans didn’t hum, even at their lowest setting.
• LED-aware dimming: Full-range dimming with a useful minimum-level adjuster; once set, it’s set-and-forget.
• Clear labeling: Guests get it immediately; no guessing which control is which.
• Compatible look: It blends with standard Decora plates and matches other Leviton devices nicely.

What could be better

• Single-pole only: No 3-way option means you can’t control the same light from a second location.
• Light slider is very easy to move: A bit more resistance would help prevent accidental changes when hitting the switch.
• Requires separate fan/light conductors: Not a flaw, but a limitation to plan for. If your fan only has one switched hot, you’ll need wiring changes.
• Not continuously variable fan speed: It’s three speeds, not a true variable control. Most fans are designed for stepped speeds anyway, but if you’re looking for granular ramping, this isn’t that.

Reliability and safety

After extended use, I haven’t had thermal issues, audible noise, or instability. The unit runs cool behind the plate. The internal electronics seem more robust than older rheostat-style dimmers, and they play much better with LEDs. As always, proper wiring and ensuring the fan/light loads are within the device’s ratings are essential. If your fan came with a factory remote, don’t stack this control on top of it; choose one approach and remove/bypass the other.

Who it’s for

• Homeowners upgrading a fan/light with separate switched leads and looking to simplify a crowded wall.
• Anyone with quality dimmable LEDs who wants smooth, quiet operation without a smart-home learning curve.
• People who prefer tactile sliders and immediate feedback over tap-to-cycle controls.

Who should look elsewhere:

• Users needing multi-location (3-way) lighting control for the same fixture.
• Fans with DC motors or built-in remote modules that can’t be bypassed.
• Households committed to smart bulbs and app-based dimming.

Final thoughts and recommendation

The SureSlide hits the sweet spot for a conventional, reliable, and tidy fan/light control. Installation is straightforward if your wiring supports separate loads, the LED dimming is smooth once you set the minimum level, and the fan side is quiet and predictable across all three speeds. It’s not a smart device and it doesn’t solve every wiring scenario, but it doesn’t try to. It focuses on doing one job—two, actually—well.

I recommend the SureSlide for most AC ceiling fans with light kits where you want compact, independent wall control and you’re using decent dimmable LEDs. You’ll appreciate the quiet low speed, the clean look, and the simplicity. If you need 3-way lighting, continuous fan speed control, or you’re working with a fan that relies on a remote module or a DC motor, choose a different solution tailored to those constraints. For the common fan-with-light case, this switch is the right kind of boring: it disappears into the wall and just works.