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This is a genuine OEM hot surface igniter (part number 1009524, an HSP-style igniter/sensor) for the Tempstar TDE050B12G1 gas furnace. On a call for heat, the control board energizes the igniter, which glows white-hot to ignite the gas at the burners. This igniter/sensor design also assists with flame confirmation during the ignition sequence. Hot surface igniters are brittle silicon-carbide or silicon-nitride elements that degrade with every heat cycle and eventually crack or lose the ability to reach ignition temperature. A failed igniter is one of the most common causes of a no-heat call: the inducer runs and the gas valve is ready, but the furnace never lights, or it locks out after several failed ignition attempts.
| Spec | Value |
|---|---|
| Part Number | 1009524 |
| Type | Hot Surface Igniter / Sensor (HSP SK) |
| Brand | Tempstar (ICP / Heil) |
| Function | Ignition + Flame Sensing |
| Fitment | OEM Replacement |
Built as a direct OEM replacement for the Tempstar TDE050B12G1 furnace and other ICP-family models (Tempstar, Heil, Comfortmaker, Arcoaire) that use the 1009524 hot surface igniter. Match the part number and mounting bracket to your existing igniter before installing.
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.