Tempstar Hot Surface Igniter for T8MPV050B12B1 — 120V Silicon Nitride HSI | Ships Today
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Overview
This OEM hot surface igniter (part number 1172533, "IGNITOR HSI") is the factory ignition element for the Tempstar T8MPV050B12B1 two-stage gas furnace. The HSI is a 120V silicon nitride igniter that heats to a glowing temperature on each call for heat, igniting the burner gas. On two-stage furnaces like this model, dependable ignition works alongside the system's gas valve (related OEM valve PN 1172822, VALVE N&L HSI 2STG HW VR8205Q) to control low- and high-fire stages. A worn or cracked igniter is the most common cause of a no-heat condition — the furnace sequences but the burners fail to light.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1172533 |
| Description | Igniter HSI |
| Type | Hot Surface Igniter (HSI) |
| Brand | Tempstar (ICP / Heil) |
| Voltage | 120V |
| Element | Silicon Nitride |
| Related Gas Valve | 1172822 (VR8205Q, 2-Stage) |
| Fitment | OEM Replacement |
Compatibility
Direct-fit replacement for the Tempstar T8MPV050B12B1 two-stage gas furnace. The 1172533 HSI is a widely used ICP igniter found across many Tempstar, Heil, and Comfortmaker furnaces. Confirm your model and existing igniter part number before ordering.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, and shut off the gas. Verify zero voltage with a multimeter.
- Access — Remove the furnace front service panel(s) to expose the burner assembly.
- Document — Photograph the igniter position and wiring before disconnecting.
- Remove — Unplug the igniter connector, remove the mounting screw(s), and withdraw the old igniter without touching the ceramic element.
- Install — Mount the new igniter, handling only the bracket — never the element. Reconnect wiring per your photo.
- 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.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days