ICP Pressure Switch for WPG3604130RKC1 — OEM Tubing Pressure Switch | Ships Today

Overview

This is the OEM tubing pressure switch for the ICP / Tempstar / Heil WPG3604130RKC1 packaged gas/electric unit, part 1178417. The pressure switch is a critical safety device that confirms the induced-draft blower is moving combustion air before the control board allows the gas valve to open. It senses negative pressure through its tubing connection; if airflow is blocked or the inducer is weak, the switch stays open and prevents ignition. When the switch sticks, leaks, or fails, the furnace will not light and typically flashes a pressure-switch fault. The correct OEM switch restores proper safety proving and reliable startup.

Specifications

Compatibility

Built for the ICP/Tempstar/Heil WPG3604130RKC1 weatherized packaged gas/electric unit and other models that originally used pressure switch 1178417. Confirm the trip set-point and tubing port configuration on your existing switch before ordering.

Installation Guide

1. Safety First — Disconnect power at the unit disconnect and verify zero voltage with a multimeter.
2. Access — Remove the inducer/control compartment service panel.
3. Document — Photograph the tubing connection and electrical terminals before disconnecting.
4. Remove — Pull the sensing tube and spade terminals, then remove the mounting screws and old switch.
5. Install — Mount the new switch, reattach the tubing fully seated, and reconnect the terminals per your photo.
6. Test — Restore power, call for heat, and confirm the inducer proves and the burners light normally.

Signs You Need a Replacement

• No heat with a flashing pressure-switch fault code.
• Inducer runs but the furnace never proceeds to ignition.
• Switch stuck open or stuck closed when tested.
• Cracked tubing port or corroded electrical terminals.

Shipping & Returns

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