Tempstar Hot Surface Igniter (HSI) for T9MPV075F12D1 — Furnace Ignition | Ships Today

Overview

This OEM hot surface igniter (HSI, part 1172533) is the ignition component for the Tempstar T9MPV075F12D1 two-stage gas furnace. On a call for heat the control board energizes the igniter, which heats past 2,000°F to light the burners; the system then proves flame before the Honeywell VR8205Q 2-stage gas valve (related part 1172822) stays open. A cracked or worn igniter is one of the most common no-heat failures — look for a furnace that cycles but never lights, a glowing igniter with no flame, or repeated ignition lockouts. This direct-fit HSI restores reliable startup on the T9MPV075 platform.

Specifications

Compatibility

Engineered for the Tempstar T9MPV075F12D1 two-stage gas furnace and compatible ICP / Heil / Comfortmaker units using HSI part 1172533. This furnace pairs the igniter with the Honeywell VR8205Q 2-stage gas valve. Verify your model and part number before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, shut off the gas, and verify zero voltage with a multimeter.
2. Access — Remove the burner compartment service panel.
3. Document — Photograph the igniter mounting and wire routing before disconnecting.
4. Remove — Unplug the igniter connector and remove the mounting screw(s), handling the old igniter by its ceramic base only.
5. Install — Mount the new igniter without touching the element, and reconnect per your photo.
6. Test — Restore gas and power, then run a heat cycle to confirm glow, ignition, and flame proof on both stages.

Signs You Need a Replacement

• Igniter glows but burners never light
• Furnace locks out after 3+ ignition attempts
• Visible cracks or hot spots on the element
• No glow at all during a call for heat

Shipping & Returns

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