ICP Hot Surface Igniter for RGS121LFAA0AAAA — Furnace Ignitor Kit | Ships Today

Overview

This OEM hot surface igniter is the ignition source for the ICP/Heil/Tempstar RGS121LFAA0AAAA gas furnace. When the thermostat calls for heat, the control board energizes this igniter, which glows red-hot to light the gas at the burners. The kit includes OEM igniter 1171306 and igniter wiring kit 1188370 for a complete, factory-correct replacement. Hot surface igniters are brittle and wear out over time — a cracked or burned-out element is one of the most common causes of a furnace that clicks but never lights. Replacing it restores reliable, on-demand ignition without the guesswork of a universal part.

Specifications

Compatibility

Directly fits the ICP/Heil/Tempstar/Comfortmaker RGS121LFAA0AAAA furnace and is shared across many models in the same RGS family. Always confirm your model number and the igniter mounting style before ordering.

Installation Guide

1. Safety First — Disconnect power and shut off the gas, then verify zero voltage with a multimeter.
2. Access — Remove the furnace front service panel.
3. Document — Photo the igniter bracket and wiring before disconnecting.
4. Remove — Unplug the igniter connector, remove the mounting screw, and lift out the old igniter without touching the element.
5. Install — Mount the new igniter, install the wiring kit, and reconnect per your photo. Handle the element by the ceramic base only.
6. Test — Restore gas and power, then run a heat cycle and confirm the igniter glows and the burners light.

Signs You Need a Replacement

• Furnace clicks and the inducer runs, but burners never light.
• Igniter shows cracks, blisters, or a broken element.
• No glow when the heat cycle starts.
• Intermittent ignition or repeated lockouts on cold mornings.

Shipping & Returns

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