Tempstar Hot Surface Igniter Kit for T8MPL050B12B2 — HSI with Gas Valve | Ships Today

Overview

This OEM hot surface igniter (HSI, part number 1172533) is the factory ignition element for the Tempstar T8MPL050B12B2 gas furnace, listed alongside the compatible Honeywell VR8205S snap-mount gas valve (part number 1175705). The HSI energizes on each call for heat, glows red-hot at roughly 120V, and ignites the burner gas. A failed igniter is the leading cause of no-heat service calls — the furnace will run the inducer and attempt ignition but never light, often ending in lockout. This durable element resists the thermal-cycling cracks that retire standard igniters early.

Specifications

Compatibility

Direct OEM fit for the Tempstar T8MPL050B12B2 furnace and shared across ICP/Heil/Comfortmaker single-stage furnaces using the 1172533 igniter. The 1175705 VR8205S valve is the matching snap-mount gas valve for the same platform. Confirm your part numbers before ordering.

Installation Guide

1. Safety First — Disconnect power at the switch and breaker, shut off the gas, and verify zero voltage with a multimeter.
2. Access — Remove the lower service/blower panel to expose the burner and igniter.
3. Document — Photograph the igniter wiring, bracket, and (if servicing) the gas valve connections.
4. Remove — Unplug the igniter connector, remove the mounting screw, and lift out the old igniter without touching the ceramic.
5. Install — Mount the new igniter in the same orientation, handling only the base, and reconnect per your photo.
6. Test — Restore gas and power, then run a full heat cycle to confirm the igniter glows and the burners light reliably.

Signs You Need a Replacement

• Inducer runs but burners never ignite (no-heat).
• Igniter does not glow or glows dim/uneven.
• Visible cracks, chips, or white spots on the ceramic.
• Repeated ignition lockouts or short cycling.

Shipping & Returns

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