Tempstar Hot Surface Igniter for T8MPV100J20B1 — Silicon Carbide HSI | Ships Today

Overview

This is the OEM hot surface igniter (HSI) for the Tempstar T8MPV100J20B1 two-stage gas furnace. The igniter (OEM part 1172533) is a silicon-carbide element that energizes on a call for heat and glows red-hot to ignite gas at the burners. It is among the most common furnace failures because the element grows brittle with each cycle. This listing covers the igniter for the B1 revision of this model, which works alongside the 1172822 two-stage gas valve (Honeywell VR8205Q). Failure symptoms include the blower running with no flame, repeated ignition lockouts, no heat, and a cracked igniter element.

Specifications

Compatibility

Fits the Tempstar T8MPV100J20B1 90%+ AFUE two-stage furnace and shared ICP/Heil platform variants using this igniter. Confirm against your unit's part list 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 burner-compartment service panel.
3. Document — Photo the igniter bracket and wiring before disconnecting.
4. Remove — Unplug the igniter connector, remove the mounting screw, and lift the old igniter out without touching the new element.
5. Install — Mount the new igniter by the ceramic base only and reconnect the plug per your photo.
6. Test — Restore gas and power, then run a heat cycle to confirm ignition and flame.

Signs You Need a Replacement

• Furnace blower runs but burners never light
• Repeated ignition lockout (3 tries then shutdown)
• Visibly cracked, chipped, or broken igniter element
• No glow visible when the unit calls for heat

Shipping & Returns

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