ICP Tubing Pressure Switch for WPG3364060LKC1 — Furnace Air Proving Switch | Ships Today
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Overview
This genuine OEM tubing pressure switch (PN 1178417) is the air-proving safety control for the gas-heat section of the ICP/Tempstar/Heil WPG3364060LKC1 package unit. It connects to the inducer/vent via tubing and proves adequate combustion draft before the furnace permits ignition. When the inducer motor starts and pulls the correct negative pressure, the switch closes and signals the control board that it is safe to energize the igniter and gas valve. If the switch never closes — due to a blocked vent, failing inducer, cracked tubing, or condensate-clogged port — the board will not allow ignition, protecting against unsafe operation. A faulty or stuck switch is a frequent cause of intermittent no-heat and ignition lockout faults.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1178417 |
| Type | Tubing Pressure Switch (Air/Draft Proving) |
| Brand | ICP / Tempstar / Heil |
| Function | Combustion Draft Safety Proving |
| Fit | OEM Direct Replacement |
Compatibility
Direct-fit replacement for the ICP/Tempstar/Heil WPG3364060LKC1 gas package unit and other ICP-family units specifying pressure switch PN 1178417. Pressure switches are calibrated to a specific set point — confirm the exact part number before ordering, as substituting a different rating will cause nuisance lockouts.
Installation Guide
- Safety First — Shut off gas and electrical power; verify zero voltage with a multimeter.
- Access — Remove the heat-section service panel.
- Document — Photograph the switch, tubing routing, and the two electrical leads before disconnecting.
- Remove — Pull the tubing off the port, disconnect the spade terminals, and remove the mounting screw(s).
- Install — Mount the new switch, reconnect the leads and tubing per your photo, ensuring the tubing has no kinks or trapped condensate.
- Test — Restore gas and power, call for heat, and confirm the inducer starts, the switch closes, and the burners light.
Signs You Need a Replacement
- No heat with the inducer running but no ignition
- Control board reports a pressure-switch or lockout fault
- Switch fails to close or stays stuck closed when checked with a meter
- Intermittent heating that drops out under certain wind/vent conditions
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