ICP Tubing Pressure Switch for WPG3304060RKC1 — OEM 1178417 | Ships Today
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Overview
This genuine ICP tubing air pressure switch (OEM part 1178417) is the safety device that proves proper combustion-air and flue draft on your ICP / Tempstar / Heil WPG3304060RKC1 package gas-electric unit. The switch monitors negative pressure created by the inducer motor through a small sensing tube and closes its 24V contacts only when adequate draft is present, allowing the ignition sequence to proceed. When draft is blocked or the inducer is weak, the switch stays open and locks out ignition to prevent unsafe operation. Common failure symptoms include a furnace that runs the inducer but never lights, a flashing pressure-switch fault code on the control board, short cycling on heat, or a unit that ignites then drops out within seconds. A cracked sensing tube, a stuck diaphragm, or corroded contacts all call for replacement with this exact OEM switch.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1178417 |
| Type | Tubing Air Pressure / Draft-Proving Switch |
| Brand | ICP (Tempstar / Heil) |
| Control Voltage | 24V |
| Function | Normally-open, closes on draft |
| Fitment | OEM direct replacement |
Compatibility
Engineered as a direct OEM replacement for the ICP / Tempstar / Heil WPG3304060RKC1 package gas-electric unit and other WPG-series models that use the 1178417 pressure switch. Always confirm the part number and tube fitting orientation against your existing switch before installing.
Installation Guide
- Safety First — Disconnect power at the unit disconnect and verify zero voltage with a multimeter before opening any panel.
- Access — Remove the blower/control service panel to reach the inducer assembly and pressure switch.
- Document — Photograph the wiring and the sensing-tube routing before disconnecting anything.
- Remove — Pull the spade connectors, slip the rubber sensing tube off the port, and unscrew the switch from its bracket.
- Install — Mount the new switch, reattach the sensing tube fully onto the port, and reconnect the spade terminals per your photo.
- Test — Restore power, start a heat call, and confirm the inducer runs and the switch closes so ignition completes without a fault code.
Signs You Need a Replacement
- Inducer runs but the burners never ignite
- Pressure-switch fault code flashing on the control board
- Furnace short cycles or lights then drops out within seconds
- Cracked or collapsed sensing tube and corroded switch contacts
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days