Tempstar Hot Surface Igniter for T8DNL075F16B2 — HSI Ignition | Ships Today

Overview

This genuine OEM hot surface igniter (part number 1172533) is the ignition element for the Tempstar T8DNL075F16B2 gas furnace, and pairs with the matched VR8205S snap-mount gas valve assembly (part number 1175705) used on this model's ignition system. On each call for heat the control board energizes the igniter, which glows white-hot to light the burners while the system gas valve releases fuel. Hot surface igniters are a high-wear consumable: the silicon-carbide element grows brittle with thermal cycling and is the single most common reason a furnace stops producing heat. A cracked element, repeated ignition lockouts, or a furnace that clicks and purges but never lights are all symptoms of a failing HSI. Installing the correct OEM igniter restores dependable, on-the-first-try ignition.

Specifications

Compatibility

Direct factory fit for the Tempstar T8DNL075F16B2 furnace and equivalent ICP, Heil, Comfortmaker, and Arcoaire furnaces that use the VR8205S-based ignition system. Match the connector style and mounting bracket to your original igniter before installing.

Installation Guide

1. Safety First — Turn off power at the switch and breaker, shut the gas supply, and verify zero voltage with a multimeter.
2. Access — Remove the burner compartment service panel.
3. Document — Photograph the igniter position, bracket, and wire routing before removing anything.
4. Remove — Unplug the igniter connector and back out the mounting screw, handling the old element only by its ceramic base.
5. Install — Seat the new igniter without touching the element with bare fingers, then reconnect the plug.
6. Test — Restore gas and power and watch a complete ignition cycle establish a steady flame.

Signs You Need a Replacement

• Furnace purges and clicks but the burners never light.
• Repeated lockouts after multiple failed ignition attempts.
• Visible cracks or a dull, non-glowing element.
• Intermittent heat that starts only after several cycles.

Shipping & Returns

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