Tempstar Hot Surface Igniter for T8MPV125J20C1 – HSI with 2-Stage Gas Valve VR8205Q | Ships Today
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Overview
This OEM hot surface igniter (part #1172533, IGNITOR HSI) lights the burners on your Tempstar T8MPV125J20C1 two-stage gas furnace. On a call for heat, the control board energizes the igniter; it glows to ignition temperature and lights the gas as the valve opens. HSI igniters are brittle and degrade with repeated thermal cycling, eventually cracking or failing to reach temperature. Common symptoms include the inducer running and the board clicking with no flame, repeated ignition lockouts, or a visibly cracked element. A matching Honeywell two-stage hot-water/heat gas valve, VR8205Q (part #1172822), is also referenced for this platform — confirm whether you need the igniter, the valve, or both before ordering. This is a direct-fit factory HSI replacement.
Specifications
| Spec | Value |
|---|---|
| Igniter Part Number | 1172533 |
| Type | Hot Surface Igniter (HSI) |
| Brand | Tempstar |
| Related Gas Valve | 1172822 – VR8205Q, 2-Stage |
| Application | 2-Stage Gas Furnace Ignition |
| Fitment | OEM |
Compatibility
Built for the Tempstar T8MPV125J20C1 two-stage gas furnace and compatible ICP/Heil/Comfortmaker models using the HSI igniter and VR8205Q two-stage gas valve. Match the connector, mounting bracket, and valve staging to your existing components before installing.
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 burner compartment service panel.
- Document – Photograph the igniter position and wiring harness before disconnecting.
- Remove – Unplug the igniter connector, remove the mounting screw, and carefully lift out the old igniter (handle by the ceramic base only — never touch the element).
- Install – Position the new igniter so the element sits correctly in the burner flame path, secure the screw, and reconnect the harness.
- Test – Restore gas and power, run a heat cycle, and confirm the igniter glows and lights the burners on both stages.
Signs You Need a Replacement
- Inducer runs and board clicks but burners never light
- Furnace locks out after several ignition attempts
- Igniter does not glow or glows weakly/unevenly
- Visible crack or break in the igniter 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