ICP Hot Surface Igniter for WPG3422090LKB1 – Silicon Nitride OEM Igniter Assembly | Ships Today
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Overview
The 1175974 Igniter Assembly is the genuine OEM hot surface igniter for the ICP/Tempstar/Heil WPG3422090LKB1 packaged gas/electric unit. The hot surface igniter (HSI) is the component that glows red-hot to ignite the gas at the burners on each call for heat. When an HSI ages, it develops microscopic cracks and carbon buildup that increase resistance, weaken the glow, and eventually prevent ignition altogether. Common failure symptoms include no heat with the inducer running, a furnace that cycles on the limit, repeated ignition lockouts, or a visibly cracked or no-longer-glowing element. This is a complete assembly with the mounting bracket and wire harness pre-terminated, so it drops directly into the original location without splicing.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1175974 |
| Type | Hot Surface Igniter Assembly |
| Brand | ICP (Tempstar / Heil) |
| Element | Silicon Nitride |
| Voltage | 120V |
| Fitment | OEM Direct Replacement |
Compatibility
Engineered as a direct-fit replacement for the ICP/Tempstar/Heil WPG3422090LKB1 packaged unit and other ICP-family furnaces and package units that originally shipped with igniter assembly 1175974. Always confirm your existing part number before ordering.
Installation Guide
- Safety First – Disconnect power at the unit disconnect and shut off the gas supply. Verify zero voltage with a multimeter before proceeding.
- Access – Remove the burner-compartment service panel.
- Document – Photograph the igniter bracket position and wire routing before disconnecting anything.
- Remove – Unplug the igniter harness connector, remove the bracket mounting screw, and carefully withdraw the old igniter. Handle only by the ceramic base — never touch the element.
- Install – Mount the new igniter in the same orientation, reseat the bracket screw, and reconnect the harness per your photo.
- Test – Restore gas and power, then start a heat cycle and confirm the igniter glows and the burners light cleanly.
Signs You Need a Replacement
- Furnace ignition lockout or repeated retries with no flame
- Igniter no longer glows, or glows dim/uneven
- Visible cracks, blistering, or white buildup on the element
- Inducer runs but burners never light
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