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This OEM hot surface igniter (HSI, part #1172533) lights the gas burners on your Tempstar T8MPN150J20B1 furnace. When the thermostat calls for heat, the control board energizes the igniter, which glows white-hot and ignites the burner gas as the gas valve (compatible OEM valve #1172821, VR8205S) opens. Hot surface igniters are fragile ceramic elements that wear out from repeated heating cycles. The classic symptom of a failed HSI is a furnace that runs its inducer and blower but never produces heat because the burners fail to light. A cracked, broken, or non-glowing igniter is the most common cause of these no-heat calls.
| Spec | Value |
|---|---|
| Part Number | 1172533 |
| Type | Hot Surface Igniter (HSI) |
| Brand | Tempstar |
| Compatible Gas Valve | 1172821 (VR8205S) |
| Function | Burner Ignition |
| Fitment | OEM |
Direct-fit replacement for the Tempstar T8MPN150J20B1 gas furnace. Also used across ICP-family furnaces (Tempstar, Heil, Comfortmaker, Arcoaire) sharing the same HSI ignition system. Handle the igniter only by its ceramic base — skin oils on the element can cause premature failure.
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.