Tempstar Hot Surface Igniter for TNK050F12A1 — Silicon Nitride | Ships Today
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Overview
This genuine OEM hot surface igniter/sensor (part #1009524) is the ignition source for the Tempstar TNK050F12A1 gas furnace. On a call for heat the control board sends line voltage to the igniter, which glows white-hot to light the burners, then doubles as a flame-proving element on this combined ignitor/sensor design. The silicon nitride element is more durable and resistant to thermal shock than older silicon carbide igniters. When this part fails, the furnace blower may run but the burners never light, producing no heat and often a lockout fault after several ignition retries. A cracked element, a no-glow condition, or repeated ignition lockouts all point to a failing igniter.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1009524 |
| Type | Hot Surface Igniter / Sensor (HSI) |
| Element | Silicon Nitride |
| Brand | Tempstar (ICP / Heil) |
| Voltage | 120V |
| Function | Ignition + flame sense |
| Fitment | OEM direct replacement |
Compatibility
Built for the Tempstar TNK050F12A1 and shared across many ICP, Heil, and Comfortmaker furnaces using the SmartLite / SK-series hot surface igniter. Confirm the connector style and mounting bracket match your existing igniter before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and shut off the gas supply; verify zero voltage with a multimeter.
- Access — Remove the furnace burner-compartment service panel.
- Document — Photograph the igniter position, bracket, and wire routing before disconnecting.
- Remove — Unplug the igniter harness, remove the mounting screw, and lift out the old igniter. Handle only by the ceramic base — never touch the element.
- Install — Mount the new igniter so the element sits in the burner flame path, secure the screw, and reconnect the harness.
- Test — Restore gas and power, start a heat cycle, and verify the igniter glows and lights the burners cleanly.
Signs You Need a Replacement
- Blower runs but burners never light (no heat)
- Furnace locks out after several ignition attempts
- Igniter shows no glow on a call for heat
- Visible crack, chip, or white spots on the element
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