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This OEM hot surface igniter (part number 1172533, "IGNITOR HSI") is the ignition component for the Tempstar T9MPV100J20D1 two-stage gas furnace. The hot surface igniter glows red-hot at the start of each heating cycle to light the burner gas. On this two-stage platform the igniter works in concert with the Honeywell VR8205Q 2-stage gas valve (related OEM part 1172822, "VALVE N&L HSI 2STG HW VR8205Q"). A cracked or worn igniter is one of the most common causes of a no-heat furnace — the inducer runs, the gas valve is commanded open, but with no glowing igniter the burners never light and the board locks out.
| Spec | Value |
|---|---|
| Part Number | 1172533 |
| Type | Hot Surface Igniter (HSI) |
| Brand | Tempstar (ICP / Heil family) |
| Voltage | 120V |
| Related Gas Valve | 1172822 — Honeywell VR8205Q 2-stage |
| Fit | OEM direct replacement |
Direct-fit replacement igniter for the Tempstar T9MPV100J20D1 two-stage gas furnace and its ICP/Heil/Comfortmaker siblings on the same platform. These models pair the HSI with the Honeywell VR8205Q 2-stage gas valve. Verify your old igniter matches 1172533 before installing.
Ships same day on orders placed before 3 PM CST. 30-day hassle-free returns. Backed by the National HVAC Parts fitment guarantee.