ICP Hot Surface Igniter Kit for RGS121HRAB0AAAA — With Wiring Harness | Ships Today

Overview

The hot surface igniter (HSI) is the heart of your ICP RGS121HRAB0AAAA furnace's ignition sequence. On each call for heat the control board sends voltage to the igniter, which glows red-hot and ignites the gas at the burners. This OEM kit pairs the igniter element (P/N 1171306) with the matching igniter wiring harness (P/N 1188370) for a clean, complete replacement. HSIs are brittle silicon-carbide or silicon-nitride elements that degrade with every heating cycle and eventually crack or burn out — the leading cause of a furnace that clicks, draws, but never lights.

Specifications

Compatibility

Designed for the ICP/Heil/Tempstar RGS121HRAB0AAAA gas furnace. The included wiring kit ensures the plug and lead match your control board connection. Handle the igniter element only by its ceramic base — skin oils and bending will shorten its life.

Installation Guide

1. Safety First — Shut off gas and disconnect electrical power; verify zero voltage with a multimeter.
2. Access — Remove the burner compartment door.
3. Document — Photograph the igniter bracket position and harness routing.
4. Remove — Unplug the harness, remove the mounting screw, and lift out the cracked igniter without touching the element.
5. Install — Seat the new igniter at the correct gap to the burner, secure the bracket, and connect the new wiring kit.
6. Test — Restore gas and power, start a heat cycle, and confirm the igniter glows and the burners light promptly.

Signs You Need a Replacement

• Furnace clicks and the inducer runs but burners never ignite
• Visible crack, blistering, or break in the igniter element
• No glow when the igniter is energized
• Intermittent no-heat calls or lockouts after several cycles

Shipping & Returns

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