Heil Pressure Switch for WPG4244040LKA1 — OEM Tubing Air Switch | Ships Today
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Overview
This is the genuine OEM tubing pressure switch (Part No. 1178417) for the ICP/Tempstar/Heil model WPG4244040LKA1. The pressure switch is a safety device that confirms the draft inducer is moving the proper volume of combustion air before the furnace is allowed to ignite. When the inducer runs, it creates negative pressure sensed through the connected tubing; the switch contacts close to prove draft and let the ignition sequence proceed. If venting is blocked, the inducer is weak, or the tubing is cracked or plugged, the switch stays open and the furnace will not fire. Common symptoms include a furnace that runs the inducer but never ignites, a pressure-switch lockout fault code, short cycling, or a switch stuck open or closed.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1178417 |
| Type | Tubing Air-Proving Pressure Switch |
| Brand | ICP / Tempstar / Heil |
| Function | Combustion Draft Verification |
| Application | Gas Furnace / Inducer Circuit |
Compatibility
Engineered as the OEM replacement for ICP/Tempstar/Heil model WPG4244040LKA1. This tubing pressure switch is used across many gas furnaces in the same brand family. Match the part number and the switch's pressure setpoint stamped on the housing before ordering, since setpoints vary by furnace input and configuration.
Installation Guide
- Safety First — Shut off gas and disconnect electrical power, then verify zero voltage with a multimeter.
- Access — Remove the furnace control/inducer access panel.
- Document — Photograph the tubing routing and electrical terminals before disconnecting.
- Remove — Pull the sensing tube off the port, disconnect the spade terminals, and unscrew the old switch from its bracket.
- Install — Mount the new switch, reconnect the wiring and sensing tube per your photo, ensuring the tube has no kinks.
- Test — Restore gas and power, then confirm the switch proves on inducer start and the furnace completes a normal heat cycle.
Signs You Need a Replacement
- Inducer runs but the furnace never ignites
- Control board reports a pressure-switch open/closed fault
- Furnace short cycles on the ignition attempt
- Switch fails to open or close when tested with a manometer
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
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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
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