ICP Hot Surface Igniter Kit for WFML090B042B1 — With Mounting Bracket | Ships Today

Overview

This OEM hot surface igniter assembly is the genuine ignition component for the ICP / Tempstar / Heil WFML090B042B1 gas furnace. The hot surface igniter (HSI) is the heart of the furnace ignition sequence: when the thermostat calls for heat, the control board energizes the igniter, which glows red-hot and ignites the gas as it flows across the burners. This package covers the complete ignition hardware for the model — OEM igniter (part 1176919), the igniter mounting bracket (part 1183455), and the HSI snap-in valve component (part 1176929, 36J24618). When an igniter cracks, ages, or fails, the furnace will lock out and stop producing heat. Common failure symptoms include no heat on a call, the burner failing to light, repeated ignition retries, a furnace that runs the inducer and blower but never fires, and a visibly cracked or carbon-coated igniter element. Hot surface igniters are wear items and naturally degrade over thousands of heating cycles.

Specifications

Compatibility

Engineered as a direct OEM fit for the ICP / Tempstar / Heil WFML090B042B1 gas furnace. ICP manufactures equipment sold under the Tempstar, Heil, and Comfortmaker brands, and these igniter components are shared across many WFML-series 90,000 BTU furnaces. Always confirm your model and part number before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, shut off the gas, and verify zero voltage with a multimeter.
2. Access — Remove the furnace burner access panel.
3. Document — Photograph the igniter wiring and bracket position before disconnecting anything.
4. Remove — Unplug the igniter connector, unscrew the mounting bracket, and carefully withdraw the old igniter without touching the ceramic element with bare fingers.
5. Install — Mount the new igniter and bracket in the exact original position, then reconnect the wiring per your photo. Never touch the silicon-carbide element directly.
6. Test — Restore gas and power, run a heat call, and confirm the igniter glows and the burners light smoothly.

Signs You Need a Replacement

• Furnace runs the inducer and blower but never ignites.
• Visibly cracked, chipped, or carbon-coated igniter element.
• Repeated ignition retries followed by a hard lockout.
• No glow from the igniter during a heat call.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.