ICP Hot Surface Igniter Kit for RGS121LSCB0AAA — with Wiring Harness | Ships Today

Overview

This OEM hot surface igniter kit (igniter #1171306 with wiring kit #1188370) lights the main burners on your ICP RGS121LSCB0AAA gas furnace. On a call for heat, the control board sends line voltage to the igniter, which glows to roughly 2,000°F and ignites gas at the burner. Hot surface igniters are a wear item — the silicon carbide or nitride element grows brittle with every heat cycle and eventually cracks, leaving you with no flame and no heat. The included wiring kit ensures a clean, terminated connection to the furnace harness so you're not splicing brittle factory leads. Because a hairline crack is often invisible, an igniter that ohms out of spec or fails to glow should be replaced as a complete assembly.

Specifications

Compatibility

Designed as the factory igniter assembly for the ICP RGS121LSCB0AAA gas furnace and shared across compatible ICP-family Tempstar, Heil, and Comfortmaker models. Verify your furnace uses a 120V hot surface igniter (not a spark or intermittent pilot system) before ordering.

Installation Guide

1. Safety First — Shut off gas and disconnect power, verify zero voltage with a multimeter.
2. Access — Remove the furnace burner compartment door.
3. Document — Photograph the igniter bracket position and wiring before disconnecting.
4. Remove — Unplug the igniter harness and unscrew the old igniter — handle only by the ceramic base, never the element.
5. Install — Mount the new igniter, terminate the included wiring kit, and reconnect per your photo.
6. Test — Restore gas and power, then watch a full heat cycle to confirm the igniter glows and the burners light.

Signs You Need a Replacement

• No heat — burners never ignite
• Igniter does not glow on a heat call
• Visible cracks or a broken element
• Furnace 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.