Tempstar Hot Surface Igniter for T8MPL125J20B2 — HSI with VR8205S Gas Valve Option | Ships Today
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Overview
This genuine OEM hot surface igniter (part number 1172533, IGNITOR HSI) is the ignition element for the Tempstar T8MPL125J20B2 gas furnace. When the thermostat calls for heat, the control board energizes the igniter, which glows red-hot to light the burners. This furnace platform also pairs with the Honeywell VR8205S snap-mount gas valve (OEM part 1175705) — listed here as the companion control component for techs servicing the complete ignition assembly. A worn or cracked igniter is the leading cause of no-heat failures: the furnace draft inducer runs and you hear ignition attempts, but the burners never light, often ending in a hard lockout. Replacing the igniter with the correct OEM silicon nitride element restores dependable lighting.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1172533 (igniter) |
| Companion Part | 1175705 — VR8205S snap gas valve |
| Type | Hot Surface Igniter (HSI) |
| Element | Silicon Nitride |
| Brand | Tempstar (ICP / Heil) |
| Voltage | 120V |
| Fits Model | T8MPL125J20B2 |
| Fitment | Genuine OEM |
Compatibility
Factory ignition component for the Tempstar T8MPL125J20B2 gas furnace. The matching Honeywell VR8205S snap-mount gas valve (1175705) is used on the same platform. Because ICP builds Tempstar, Heil, and Comfortmaker furnaces on shared designs, igniter 1172533 also services many comparable ICP-built models. Verify your unit's part number on the rating plate before ordering.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, shut off the gas, and verify zero voltage with a multimeter.
- Access — Remove the furnace burner/service panel.
- Document — Photograph the igniter wiring, bracket, and (if servicing the valve) the gas valve connections before disconnecting.
- Remove — Unplug the igniter harness and remove the mounting screw. Lift the old igniter out by its ceramic base — never touch the element with bare fingers.
- Install — Position the new igniter in the burner flame path, secure the screw, and reconnect the harness per your photo.
- Test — Restore gas and power, run a heat cycle, and confirm the igniter glows and the burners light within the normal trial-for-ignition window.
Signs You Need a Replacement
- Igniter fails to glow on a call for heat
- Cracked, chipped, or white-blistered element
- Furnace locks out after multiple failed ignition attempts
- Inducer and gas valve cycle but burners never ignite
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