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Lippert 135666 Slide-Out Controller for Above Floor and Through Frame Systems -- LCI Electric Slide Control Module

Lippert 135666 slide-out controller module for LCI Above Floor and Through Frame RV slide-out systems, Made in USA

Lippert Slide-Out Controller For Above Floor/Through Frame Systems

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List Price: $165.49

: $165.49

Part Number: 135666
Manufacturer: Lippert

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Lippert / LCI Part 135666 Made in USA Lippert 135666 Slide-Out Controller -- Above Floor & Through Frame Systems

When your slide-out stops responding or cycles erratically, the control module is often the culprit. The Lippert 135666 is a direct-replacement slide-out controller designed for LCI Above Floor and Through Frame electric slide systems -- two of the most common slide architectures found in production RVs. Plug-in replacement design means no splicing and no custom wiring, just a clean swap to restore reliable slide operation.

Direct-Replacement Control Module for LCI Electric Slide Systems

The Lippert 135666 controller manages motor direction, travel limits, and protection logic for LCI's Above Floor and Through Frame slide-out mechanisms. These systems are found in a wide range of production trailers and fifth wheels from manufacturers including Thor Industries (cross-referenced as Thor part number 0207271). If your slide-out is unresponsive, throws a fault, or reverses unexpectedly, replacing this module is a standard first diagnostic step.

The unit arrives fully assembled -- no bench configuration or DIP-switch adjustment is required before installation. The wiring harness is NOT included; reuse the harness from your existing setup or source one separately if yours is damaged.

Plug-In Replacement

Mates to the existing LCI wiring harness. No wire splicing or custom connections needed for a straightforward swap.

Wide Fitment

Engineered for LCI Above Floor and Through Frame electric slide systems -- among the most common slide architectures in production RVs.

No Assembly Required

Ships ready to install. The module is factory-assembled and tested; just mount, connect, and verify operation.

Made in the USA

Manufactured domestically by Lippert Components, the leading OEM supplier for RV slide-out systems.

What This Controller Does

The slide-out controller acts as the brain of the electric slide mechanism. It receives input from the in-coach switch (extend/retract), reads feedback from the motor and limit switches, and controls the direction and duration of motor power. It also provides protection against over-travel and motor overload. When this module fails, symptoms typically include:

Slide-out will not move in either direction despite a good battery charge
Slide extends but will not retract (or vice versa)
Slide-out reverses direction immediately after starting
Controller does not respond to wall switch or keypad input
Blown fuse that returns after replacement (indicating a protection fault)

OEM-Level Quality: Lippert Components (LCI) is the original manufacturer for the slide systems in thousands of production RVs. This is the same controller supplied to chassis manufacturers at the factory -- not an aftermarket substitute.

Compatibility -- Above Floor vs. Through Frame Systems

LCI produces two main electric slide architectures that use this controller family:

Above Floor (AF) Systems: The drive mechanism (rack, motor, gearbox) is mounted above the floor level inside the coach. Common in slide rooms with a flat floor transition.
Through Frame (TF) Systems: The actuator mechanism passes through the RV frame rails. Often found on larger, heavier slide rooms in fifth wheels and larger travel trailers.

Both system types use the same 135666 control module. If you are unsure which system you have, look for the LCI label on the motor/gearbox assembly or check your coach's build sheet.

Cross-Reference Numbers: Lippert 135666 is also sold under LCI internal reference number 10665 and Thor Industries part number 0207271. If any of these numbers match your existing module label, this is the correct replacement.

Installation Overview

Replacing the slide-out controller is a serviceable DIY repair for owners comfortable with basic 12V electrical work. General steps:

Fully retract the slide-out before beginning work
Disconnect shore power and the coach battery to eliminate live-circuit risk
Locate the existing controller -- typically mounted near the slide motor or in a basement compartment
Document or photograph the existing harness connections before unplugging
Unmount the old controller and connect the existing harness to the 135666
Mount the new controller in the same location using original hardware
Reconnect battery, restore power, and test extend/retract function from the in-coach switch

Harness Not Included: The wiring harness is sold separately. Reuse your existing harness if it is undamaged. Inspect connectors for corrosion or heat damage before reinstalling -- a failed harness can damage a new controller.

Maintenance Tip: After installing a new controller, cycle the slide-out fully in and out 2-3 times and listen for smooth, consistent motor operation. Check that the slide seals are making even contact all around before declaring the repair complete. If the slide still faults, test the limit switches and motor before assuming the new controller is defective.

Product Identity

Manufacturer	Lippert Components (LCI)
Lippert Part Number	135666
LCI Reference Number	10665
Thor Cross-Reference	0207271
UPC	848150011749
Country of Origin	USA

Physical Specifications

Shipping Weight	3 lbs.
Assembly Required	No -- ships fully assembled

System Compatibility

Compatible Systems	LCI Above Floor (AF) and Through Frame (TF) electric slide-out systems
Drive Type	Electric motor-driven rack or actuator slide mechanisms
Coach Voltage	12V DC (standard RV chassis electrical)

What's in the Box

Included	Lippert 135666 slide-out controller module
Not Included	Wiring harness (reuse existing or purchase separately)
Not Included	Mounting hardware (reuse existing)

Warranty

Warranty	Limited 1-Year Manufacturer Warranty
Warranty Issuer	Lippert Components, Inc.

Important Information

The wiring harness is NOT included with this controller. You must reuse your existing harness or purchase one separately.
Disconnect all power sources (shore power AND coach battery) before removing or installing this controller.
This controller is designed specifically for LCI Above Floor and Through Frame electric slide systems. Verify your system type before ordering -- it is not compatible with hydraulic slide systems or competitor slide mechanisms.
Inspect the existing harness for damaged insulation, corroded pins, or heat stress before connecting it to the new controller. A shorted harness can damage the replacement module.
If symptoms persist after installation, test motor function and limit switch continuity before concluding the new controller is faulty.
Warranty coverage may be affected by installation errors or use with incompatible systems. Refer to Lippert warranty terms for details.

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