What are the specs for this Pressure Switch?

The correct replacement for ICP model WPG4484115LKA1 — OEM 1178417 | Ships Today is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your ICP equipment which lists the model number WPG4484115LKA1 — OEM 1178417 | Ships Today.

ICP

ICP Pressure Switch with Tubing for WPG4484115LKA1 — OEM 1178417 | Ships Today

Name: ICP Pressure Switch with Tubing for WPG4484115LKA1 — OEM 1178417 | Ships Today
Brand: ICP
SKU: 1178417
Price: 37.70 USD
Availability: InStock

SKU: 1178417 Brand: ICP

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Overview

This OEM air pressure switch with tubing (part 1178417, TUBING PRESSURE SWITCH) is the direct-fit safety control for the ICP/Tempstar/Heil WPG4484115LKA1 unit. The switch is a 24V normally-open device that proves the induced-draft blower is producing adequate negative pressure before the control board allows ignition. If venting is blocked, the draft motor is weak, or the switch itself sticks, the furnace will not light or will short-cycle on a safety lockout. Replacing a faulty switch and its hose restores reliable proving of draft and safe operation.

Specifications

Spec	Value
Part Number	1178417
Type	Air Pressure Switch (with tubing)
Brand	ICP (Tempstar / Heil)
Control Voltage	24V
Action	Normally Open, proves draft
Fit	OEM Direct Replacement

Compatibility

Built for the ICP/Tempstar/Heil WPG4484115LKA1 and shared-platform furnaces using the same draft-proving control. Confirm the pressure set point on your original switch matches before installing.

Installation Guide

Safety First — Disconnect power and verify zero voltage with a multimeter; shut off the gas.
Access — Remove the service panel to reach the inducer assembly and switch.
Document — Photograph the wire terminals and tubing routing before disconnecting.
Remove — Pull the spade connectors and pressure hose, then unscrew the old switch.
Install — Mount the new switch, attach the tubing without kinks, and reconnect the wires per your photo.
Test — Restore power and gas, start a heat call, and confirm the inducer proves and burners light.

Signs You Need a Replacement

Furnace inducer runs but burners never light
Lockout or fault code indicating pressure switch open
Short-cycling during the heating sequence
Cracked or disconnected pressure tubing

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

ICP Pressure Switch with Tubing ...

$37.70

Frequently Asked Questions

Does this Pressure Switch fit my ICP WPG4484115LKA1 — OEM 1178417 | Ships Today?

Yes. This is the factory-specified OEM pressure switch for the ICP WPG4484115LKA1 — OEM 1178417 | Ships Today. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the pressure switch on my ICP WPG4484115LKA1 — OEM 1178417 | Ships Today?

Difficulty: Medium (20–30 min)
Step 1: Turn off power. Step 2: Locate pressure switch near draft inducer. Step 3: Note tubing orientation. Step 4: Disconnect tubing and wires. Step 5: Remove screw, install new switch. Step 6: Reconnect tubing and wires, restore power.

My furnace shows a pressure switch error. What do I replace?

Furnace LED showing pressure switch error = switch not detecting draft inducer airflow. Try first: clear the rubber tubing to the switch (often clogged with condensation). If problem persists, replace the pressure switch.

Is this pressure switch compatible with Bryant or Payne too?

Many ICP parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my ICP pressure switch?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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