ICP Hot Surface Igniter for WPG4604090LKA1 — Furnace Ignition | Ships Today
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Overview
This OEM hot surface igniter assembly — covering ICP part numbers 1186861 (control board igniter) and 1177663 (ignitor) — is the ignition source for the gas section of the ICP / Tempstar / Heil WPG4604090LKA1 packaged gas-electric unit. On a heat call the control board energizes the igniter, which glows white-hot and lights the burners as the gas valve opens. The silicon element is the single most replaced part in a gas furnace because it is brittle, runs at extreme temperature, and degrades with every ignition cycle. A cracked or worn igniter is the most common cause of "furnace clicks but won't light" no-heat calls.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1186861, 1177663 |
| Type | Hot Surface Igniter |
| Brand | ICP / Tempstar / Heil |
| Application | Gas furnace burner ignition |
| Fit | OEM direct replacement |
Compatibility
Designed for the ICP WPG4604090LKA1 gas-electric packaged unit and shared across many Tempstar, Heil, and Comfortmaker furnaces that use this igniter platform. Handle the silicon element only by its ceramic base — skin oils cause premature failure.
Installation Guide
- Safety First — Shut off gas and disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the furnace burner/blower access panel.
- Document — Photograph the igniter bracket position and wiring harness routing before disconnecting.
- Remove — Unplug the igniter connector and remove the mounting screw(s), then withdraw the element without touching the silicon tip.
- Install — Mount the new igniter so the element sits in the burner flame path, then reconnect the harness per your photo.
- Test — Restore gas and power, run a heat cycle, and confirm the igniter glows and the burners light promptly.
Signs You Need a Replacement
- Furnace clicks and tries to start but never lights (no heat)
- Igniter no longer glows when energized
- Visible crack, blister, or break in the silicon element
- System short-cycles or locks out after several failed ignition attempts
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