ICP Pressure Switch for WPG3424090RKC1 — OEM with Tubing | Ships Today

Overview

This OEM pressure switch (supplied with tubing) is the draft safety that verifies proper venting before the ICP Tempstar Heil WPG3424090RKC1 is allowed to fire. When the inducer motor starts, it creates a vacuum that the switch senses through its tubing; only when adequate draft is proven does the switch close and permit the control board to energize the igniter and gas valve. A failed switch, blocked tubing, or a cracked hose will prevent ignition or cause lockouts. Symptoms include the inducer running with no ignition, repeated pressure-switch fault codes, or a furnace that lights then drops out. This is an exact OEM replacement for part 1178417 and includes the connecting tubing.

Specifications

Compatibility

Direct-fit replacement for the ICP Tempstar Heil WPG3424090RKC1 packaged gas unit and ICP-family equipment (Tempstar, Heil, Comfortmaker, Arcoaire) that originally used OEM pressure switch 1178417. Match the switch set point and port configuration to your existing switch before ordering.

Installation Guide

1. Safety First — Disconnect power and verify zero voltage with a multimeter.
2. Access — Remove the control/burner compartment service panel.
3. Document — Photograph the tubing routing and wire terminals before disconnecting.
4. Remove — Pull the electrical leads, detach the tubing, and remove the mounting screws and old switch.
5. Install — Mount the new switch, attach the supplied tubing (no kinks or sags), and reconnect the leads per your photo.
6. Test — Restore power, call for heat, and confirm the inducer proves draft and the burners ignite without lockout.

Signs You Need a Replacement

• Inducer runs but the furnace never ignites.
• Repeated pressure-switch fault codes.
• Furnace lights then shuts down on safety.
• Cracked tubing or a switch stuck open/closed.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.