Tempstar Hot Surface Igniter & Sensor Kit for T8DNL100F14A1 | Ships Today

Overview

This genuine OEM hot surface igniter and sensor kit (part number 1009524) is the ignition component for the Tempstar T8DNL100F14A1 gas furnace. On a call for heat the control board sends line voltage to the igniter, which glows orange-hot and lights the burners; the integrated sensor then confirms flame so the board keeps the gas valve open. Hot surface igniters are the most common furnace failure point because the silicon-carbide element is brittle and degrades with every heating cycle. A cracked or worn igniter produces no-heat calls, repeated ignition lockouts, or a furnace that clicks and tries to light but never fires. Replacing it with the correct OEM kit restores reliable ignition and proper flame sensing.

Specifications

Compatibility

Direct factory fit for the Tempstar T8DNL100F14A1 furnace. The same igniter/sensor kit serves equivalent gas furnaces across the shared ICP, Heil, Comfortmaker, and Arcoaire platform. Match the connector and mounting tab to your original igniter before installing.

Installation Guide

1. Safety First — Shut off power at the furnace switch and breaker, close the gas, and verify zero voltage with a multimeter.
2. Access — Remove the burner compartment service panel.
3. Document — Photograph the igniter's mounting position and wire routing before removing anything.
4. Remove — Unplug the igniter connector and remove the mounting screw; handle the old element only by its ceramic base, never the fragile glowing element.
5. Install — Mount the new igniter without touching the element surface with bare fingers, then reconnect the plug.
6. Test — Restore gas and power and watch a full ignition cycle confirm a steady flame.

Signs You Need a Replacement

• Furnace tries to ignite but never lights (no-heat call).
• Repeated ignition lockouts after three failed attempts.
• Visible cracks or a dull, no-glow element.
• Burners light briefly then shut off on flame-sense fault.

Shipping & Returns

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