Tempstar Hot Surface Igniter for T8MPL075B12B1 | OEM 1172533 HSI | Ships Today
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Overview
This genuine OEM hot surface igniter (HSI, part number 1172533) is the ignition source for the Tempstar T8MPL075B12B1 gas furnace. On each call for heat the control board energizes the igniter, which glows red-hot to ignite the gas at the burners. Hot surface igniters are a common wear item: the brittle silicon-carbide element degrades with every heating cycle and eventually cracks, leaving the furnace unable to light. Symptoms include the inducer running and gas valve clicking but no flame, or the furnace locking out after several failed ignition attempts. This factory-correct igniter restores reliable first-try ignition. This listing also references companion gas valve part 1172821 (Honeywell VR8205S) used in the same ignition system.
Specifications
| Spec | Value |
|---|---|
| Primary Part Number | 1172533 |
| Type | Hot Surface Igniter (HSI) |
| Brand | Tempstar (ICP) |
| Related Gas Valve | 1172821 (Honeywell VR8205S) |
| Element | Silicon carbide |
| Fitment | OEM exact replacement |
Compatibility
Fits the Tempstar T8MPL075B12B1 gas furnace and related ICP-built models under the Tempstar, Heil, and Comfortmaker brands that use this hot surface ignition system. Confirm the igniter style and mounting bracket match your original before ordering.
Installation Guide
- Safety First - Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter before working.
- Access - Remove the burner compartment service panel.
- Document - Photograph the igniter position and wiring before disconnecting.
- Remove - Unplug the igniter connector, remove the mounting screw, and carefully withdraw the old igniter without touching the element.
- Install - Mount the new igniter (handle only by the ceramic base, never the silicon-carbide element), position it correctly over the burner, and reconnect the plug.
- Test - Restore power and run a heat cycle to confirm the igniter glows and lights the burners on the first attempt.
Signs You Need a Replacement
- Igniter no longer glows during a call for heat
- Visible crack or break in the silicon-carbide element
- Furnace locks out after repeated failed ignition attempts
- Inducer and gas valve cycle but the burners never light
Shipping & Returns
Ships same day on orders placed 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