ICP Tubing Pressure Switch for WPG3484130LKC1 — OEM 1178417 | Ships Today
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Overview
This genuine ICP tubing pressure switch (OEM part 1178417) is the air-proving safety control for the WPG3484130LKC1 package unit. It senses negative draft pressure created by the inducer blower and closes its contacts to confirm proper venting before the ignition sequence is allowed to begin. If adequate draft is not detected, the switch keeps its contacts open and locks out ignition to prevent unsafe combustion. A failed or out-of-range pressure switch is one of the most common causes of a furnace that runs the inducer but never lights, or that short-cycles on a flashing control code. Replacing it with the correct OEM-spec switch restores reliable, safe heating operation.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1178417 |
| Type | Tubing Air Pressure Switch |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
| Function | Draft / air-proving safety switch |
| Fitment | OEM direct replacement |
| Model | WPG3484130LKC1 |
Compatibility
Engineered as a direct-fit replacement for the ICP Tempstar Heil WPG3484130LKC1 package unit and shares the same pressure tap, electrical terminals, and mounting bracket as the original control. Always confirm the part number stamped on your existing switch before ordering.
Installation Guide
- Safety First — Disconnect power at the unit disconnect and verify zero voltage with a multimeter.
- Access — Remove the control/blower service panel.
- Document — Photograph the wiring and the pressure tubing routing before disconnecting anything.
- Remove — Pull the spade connectors, slide off the rubber pressure tube, and unscrew the switch from its bracket.
- Install — Mount the new switch, reconnect the tubing without kinks, and reattach the wires per your photo.
- Test — Restore power, start a heat call, and confirm the inducer proves and the burners light normally.
Signs You Need a Replacement
- Inducer runs but the burners never ignite
- Furnace short-cycles or locks out with a pressure-switch fault code
- Switch contacts stuck open or stuck closed when tested with a meter
- Cracked switch body or a pressure tube that no longer holds the diaphragm
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