Tempstar Hot Surface Igniter for T9MPD075F12A2 — Silicon Nitride HSI/Sensor Kit | Ships Today

Overview

This is the OEM hot surface igniter and flame-sensor kit (OEM #1009524, "IGNITOR/SENSOR HSP SK") for the Tempstar T9MPD075F12A2 gas furnace. The hot surface igniter (HSI) is a silicon-nitride element that heats to roughly 2,000°F at the start of each heat cycle to light the burner gas, while the paired flame sensor verifies ignition so the control board keeps the gas valve open. Igniter failure is a leading no-heat cause — the brittle element cracks from repeated thermal cycling or contamination, ignition fails, and the furnace locks out after several tries. This silicon-nitride design runs on the standard 120V igniter circuit and outlasts older silicon-carbide glow-bar igniters, resisting the chipping that ends most igniter service lives.

Specifications

Compatibility

Engineered for the Tempstar T9MPD075F12A2 furnace and shared across the ICP family (Tempstar, Heil, Comfortmaker, and related ICP-built gas furnaces) that use the 1009524 igniter/sensor platform. Confirm against your unit's parts list before ordering.

Installation Guide

1. Safety First — Switch off the furnace at the disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the burner-compartment service panel.
3. Document — Photograph the igniter bracket, ceramic block, and wire routing before disconnecting.
4. Remove — Unplug the igniter connector, remove the mounting screw(s), and lift the old igniter out. Handle by the ceramic base only — never touch the element.
5. Install — Seat the new igniter so the element sits in the burner flame path, fasten the bracket, and reconnect the plug per your photo.
6. Test — Restore power and run a heat cycle; confirm the igniter glows, the burners light, and the flame sensor proves the flame without lockout.

Signs You Need a Replacement

• Furnace clicks and calls for heat but burners never light.
• Igniter shows no glow, or has visible cracks/white spots on the element.
• Furnace short-cycles or locks out after 3 ignition attempts.
• Intermittent no-heat on cold mornings as the element degrades.

Shipping & Returns

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