ICP Pressure Switch Tubing for WPG4484130LKB1 — OEM 1178417 | Ships Today

Overview

This OEM pressure switch tubing (part 1178417) is the draft-proving hose assembly for the ICP Tempstar Heil WPG4484130LKB1 furnace. The tubing connects the inducer/collector box to the pressure switch, transmitting the negative pressure that proves combustion airflow before the control board allows the igniter and gas valve to energize. Cracked, brittle, or blocked tubing prevents the switch from closing, so the furnace locks out for safety and will not heat. Replacing this inexpensive part restores reliable draft proving and clears nuisance pressure-switch faults.

Specifications

Compatibility

Designed for the ICP / Tempstar / Heil WPG4484130LKB1 furnace and other ICP-family models using tubing 1178417. Verify routing and length against your existing hose before installing.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the burner-compartment service panel.
3. Document — Photograph how the tubing routes between the inducer/collector box and the pressure switch ports.
4. Remove — Pull the old tubing from both barbed fittings, inspecting ports for soot or condensate.
5. Install — Press the new tubing fully onto each fitting with no kinks or sags that could trap condensate.
6. Test — Restore power, start a heat call, and confirm the switch closes and the furnace ignites normally.

Signs You Need a Replacement

• Furnace locks out on a pressure-switch fault code.
• Tubing is cracked, hardened, kinked, or filled with condensate.
• Inducer runs but ignition never starts.
• Intermittent no-heat that clears after the hose is reseated.

Shipping & Returns

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