Lippert 140506 2-Room Hydraulic Slide-Out IRC with Plate Assembly Replacement

Restore Your Hydraulic Slide-Out System the Right Way

The IRC (Integrated Relay Control) is the switching heart of Lippert's hydraulic slide-out systems. It receives signals from the coach's slide control switches, interprets them, and fires the hydraulic pump motor and directional valves to extend or retract each slide room. When an IRC fails -- whether from moisture intrusion, corrosion, a wiring fault, or simple age -- both rooms can become unresponsive or operate erratically.

The Lippert 140506 is a direct OEM-equivalent replacement that comes pre-assembled with its mounting plate, so the swap is a matter of disconnecting the existing harness connectors, unbolting the old assembly, and bolting in the new one. No splicing, no drilling new holes.

What Is an IRC and Why Does It Fail?

Hydraulic slide-out systems on larger RVs and fifth wheels use a central hydraulic pump with solenoid-controlled valves to route fluid pressure to each slide's hydraulic cylinder. The IRC sits between your wall switch (or touchpad) and those solenoids and the pump motor. It acts as the logic and relay center -- deciding which direction to run, how long to run, and when to stop.

Common IRC failure causes include:

• Moisture and road spray entering the control box over time
• Relay contacts burning out from repeated cycling
• Corrosion on the connector pins from exposure under the chassis
• Voltage spikes during generator startup or shore power surges
• Physical damage from road debris

Designed for 2-Room Systems

This specific assembly -- part number 140506 -- is configured for 2-room hydraulic slide-out setups. Lippert produces distinct IRC assemblies based on the number of rooms being controlled, because each additional room requires additional relay channels and valve outputs. Using a single-room IRC on a 2-room system (or vice versa) will result in incomplete slide operation or no operation at all.

Installation Overview

This is a competent DIY replacement for anyone comfortable working with 12V RV electrical systems. The general process involves:

• Locating the existing IRC assembly -- typically mounted on a bracket near the hydraulic pump unit, often in a rear or underbelly compartment
• Photographing or labeling all connector positions on the old unit before disconnecting
• Disconnecting the multi-pin harness connectors (no cutting required on most Lippert installs)
• Removing the mounting fasteners and pulling the old plate and IRC free
• Bolting the new 140506 assembly into place using the original hardware
• Reconnecting the harness connectors in the same positions
• Testing extend and retract function for both rooms before buttoning up the compartment

Part Identification

Physical Specifications

Warranty and Compliance

What's in the Box

Compatibility Notes