ICP Tubing Pressure Switch for WPG4364060RKA1 — OEM 1178417 | Ships Today

Overview

This is a genuine OEM tubing pressure switch (part number 1178417) for the ICP / Tempstar / Heil WPG4364060RKA1 packaged gas heat / electric cool unit. The pressure switch is a critical safety control that monitors air pressure created by the inducer (draft) motor before the unit is permitted to light. If the switch does not sense the correct negative pressure through its sensing tubing, the control board will not energize the igniter, preventing unsafe operation with a blocked flue or failed inducer. A failed switch is one of the most common reasons a furnace section will not fire on a call for heat. Symptoms include the inducer running continuously without ignition, a lockout fault code, or short cycling on the pressure-switch circuit.

Specifications

Compatibility

Designed as a direct-fit replacement for the ICP WPG4364060RKA1 packaged unit and shared across the Tempstar, Heil, and Comfortmaker family of WPG-series gas/electric package units. Always confirm the part number stamped on your existing switch matches 1178417, as pressure-switch trip points are model-specific.

Installation Guide

1. Safety First — Disconnect power at the disconnect and verify zero voltage with a multimeter before touching any wiring.
2. Access — Remove the unit's control / blower access panel to reach the pressure switch near the inducer assembly.
3. Document — Photograph the wire terminals and the routing of the sensing tubing before disconnecting anything.
4. Remove — Pull the spade terminals off the switch, slide the rubber sensing tube off the port, and remove the mounting screws.
5. Install — Mount the new switch, reconnect the sensing tubing fully onto the port, and reattach the electrical terminals per your photo.
6. Test — Restore power and start a heat cycle; confirm the inducer proves and the igniter energizes within a few seconds.

Signs You Need a Replacement

• Inducer motor runs but the unit never lights or locks out.
• Pressure-switch fault code flashing on the control board.
• Switch contacts stuck open or closed when tested with a meter.
• Cracked, brittle, or collapsed sensing tubing on the switch.

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day returns on unused parts. Backed by the National HVAC Parts fitment guarantee.