ICP Pressure Switch for WPG4604130RKA1 — OEM Tubing Assembly | Ships Today

Overview

This OEM tubing pressure switch (part 1178417) is the combustion-air safety control on the ICP Tempstar/Heil WPG4604130RKA1 packaged gas/electric unit. It proves that the inducer (draft) motor is pulling adequate flue draft before the control board allows ignition. If the switch does not close — or stays open due to a blocked flue, cracked tubing, weak inducer, or condensate-clogged port — the board halts the ignition sequence to prevent unsafe combustion. Common symptoms are a no-heat condition with the inducer running but no ignition, a fault/lockout code pointing to the pressure switch circuit, or a unit that lights then immediately shuts down. Replacing a failed switch and its tubing restores reliable, safe heating operation.

Specifications

Compatibility

Designed for the ICP/Tempstar/Heil WPG4604130RKA1 packaged unit and related WPG-series models using this tubing pressure switch assembly. Match the switch set point and tubing configuration to your existing OEM part before installing.

Installation Guide

1. Safety First — Disconnect power and verify zero voltage with a multimeter; shut off the gas supply.
2. Access — Remove the control/burner service panel.
3. Document — Photograph the switch wiring and the routing of the sensing tubing.
4. Remove — Pull the spade terminals, detach the tubing, and unscrew the switch from its bracket.
5. Install — Mount the new switch, connect the tubing without kinks, and reattach the wiring per your photo.
6. Test — Restore gas and power, start a heat cycle, and confirm the switch closes and the burners ignite normally.

Signs You Need a Replacement

• Inducer runs but the unit never ignites.
• Control board reports a pressure-switch fault or lockout.
• Unit lights briefly then shuts down on safety.
• Cracked, brittle, or disconnected sensing tubing.

Shipping & Returns

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