Tempstar Hot Surface Igniter for T8MPV050B12C1 — 120V Silicon Nitride HSI | Ships Today

Overview

This OEM hot surface igniter (part number 1172533, "IGNITOR HSI") is the factory ignition element for the Tempstar T8MPV050B12C1 two-stage gas furnace. The HSI is a 120V silicon nitride igniter that heats to glowing temperature on each call for heat to ignite the burner gas. On two-stage models like this one, reliable ignition is paired with the system's gas valve (related OEM valve PN 1172822, VALVE N&L HSI 2STG HW VR8205Q) to manage low- and high-fire operation. A failed igniter is the most frequent cause of a no-heat call — the furnace cycles but the burners never light.

Specifications

Compatibility

Direct-fit replacement for the Tempstar T8MPV050B12C1 two-stage gas furnace. The 1172533 HSI is a widely used ICP igniter found in many Tempstar, Heil, and Comfortmaker furnaces. Confirm your model and existing igniter part number before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, and shut off the gas. Verify zero voltage with a multimeter.
2. Access — Remove the furnace front service panel(s) to expose the burner assembly.
3. Document — Photograph the igniter position and wiring before disconnecting.
4. Remove — Unplug the igniter connector, remove the mounting screw(s), and withdraw the old igniter without touching the ceramic element.
5. Install — Mount the new igniter, handling only the bracket — never the element. Reconnect wiring per your photo.
6. Test — Restore gas and power, run a heat cycle, and confirm the igniter glows and the burners light without lockout.

Signs You Need a Replacement

• Blower runs but burners never light on a call for heat.
• Visible cracks, chips, or hot spots on the igniter element.
• Igniter fails to glow during the ignition sequence.
• Control board flashes an ignition-failure or lockout fault code.

Shipping & Returns

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