Tempstar Hot Surface Igniter for T8DNL075B12B1 – HSI Furnace Ignitor | Ships Today
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Overview
This is a genuine OEM hot surface igniter (HSI, part number 1172533) for the Tempstar T8DNL075B12B1 gas furnace. On each call for heat the control board sends voltage to the igniter, which glows white-hot to light the gas at the burners. Because the igniter element is brittle and cycles through extreme heat, it is one of the most common furnace failure points. A cracked or burned-out igniter is the usual cause of a furnace that clicks, runs its inducer, but never lights — leaving you with no heat. This OEM HSI restores reliable, consistent ignition.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1172533 |
| Type | Hot Surface Igniter (HSI) |
| Brand | Tempstar (ICP / Heil) |
| Description | IGNITOR HSI |
| Function | Direct ignition of burner gas |
| Related Component | Pairs with VR8205S snap-mount gas valve (1172821) |
Compatibility
Direct-fit replacement for the Tempstar T8DNL075B12B1 furnace. This 1172533 hot surface igniter is used across ICP-family furnaces (Tempstar, Heil, Comfortmaker, Arcoaire) that use snap-mount HSI ignition with the Honeywell VR8205S gas valve. Match the mounting bracket and connector to your original before installing.
Installation Guide
- Safety First – Disconnect power at the furnace switch and breaker and shut off the gas, then verify zero voltage with a multimeter.
- Access – Remove the burner-compartment service panel.
- Document – Photograph the igniter position, bracket, and wire routing before disconnecting.
- Remove – Unplug the igniter connector and remove the mounting screw; lift the old igniter out without touching the ceramic element of the new one.
- Install – Mount the new igniter handling it only by the ceramic base, align it over the burner per your photo, and reconnect the plug.
- Test – Restore gas and power, then run a heat cycle to confirm the igniter glows and the burners light.
Signs You Need a Replacement
- Inducer runs and you hear clicks, but the burners never ignite
- No heat with the furnace cycling on a lockout
- Igniter shows visible cracks, blistering, or no glow on a call for heat
- Infinite resistance reading across the igniter terminals
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