Tempstar Hot Surface Igniter for T9MVX040F12A1 — HSI Ignition | Ships Today
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Overview
This OEM hot surface igniter (HSI, part #1172533) lights the burners on your Tempstar T9MVX040F12A1 two-stage gas furnace. On a heat call the control board energizes the igniter, which glows red-hot and ignites gas released by the VR8205Q two-stage gas valve (#1172822). HSI elements are brittle and degrade with every heating cycle, so they are one of the most common no-heat failure points. A cracked or burned-out igniter is the typical cause when the inducer and gas valve cycle but the burners never light, often leaving the furnace locked out on ignition failure.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1172533 |
| Type | Hot Surface Igniter (HSI) |
| Brand | Tempstar (ICP / Heil) |
| Ignition System | 2-Stage Gas |
| Related Gas Valve | 1172822 (VR8205Q, 2-stage) |
Compatibility
Direct OEM fit for the Tempstar T9MVX040F12A1 variable-speed gas furnace and is shared across many ICP-family furnaces under the Tempstar, Heil, Comfortmaker, and Arcoaire brands. Handle the silicon-nitride element only by its ceramic base — skin oils shorten its life. Verify the printed part number before ordering.
Installation Guide
- Safety First — Shut off gas and disconnect electrical power at the switch and breaker; verify zero voltage with a multimeter.
- Access — Remove the burner compartment service panel.
- Document — Photograph the igniter's position, bracket orientation, and wire harness before disconnecting.
- Remove — Unplug the igniter connector and remove the mounting screw(s); lift the element out without touching the ceramic tip.
- Install — Seat the new igniter at the correct depth over the burner, secure the bracket, and reconnect the harness.
- Test — Restore gas and power, then watch a full cycle to confirm the igniter glows and the burners light promptly.
Signs You Need a Replacement
- Inducer and gas valve cycle but burners never ignite
- Furnace locks out on ignition-failure code after several tries
- Visible crack, split, or burned spot on the igniter element
- Igniter shows no glow or measures open/out-of-spec resistance
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