What igniter fits my Tempstar furnace?

The correct replacement for Tempstar model T8MPT125J20B1 — HSI Kit | Ships Today is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Tempstar equipment which lists the model number T8MPT125J20B1 — HSI Kit | Ships Today.

My furnace will not ignite. What part is bad?

A furnace that will not ignite after the draft inducer runs typically has a failed igniter. The hot surface igniter should glow bright orange within 60 seconds. If it does not glow at all, it is cracked or burned out. If it glows weakly, it is degrading and should be replaced preventively. Average lifespan: 3 to 7 years.

Is this igniter compatible with Bryant or Payne systems too?

Many Tempstar parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Tempstar

Tempstar Hot Surface Igniter for T8MPT125J20B1 — HSI Kit | Ships Today

Name: Tempstar Hot Surface Igniter for T8MPT125J20B1 — HSI Kit | Ships Today
Brand: Tempstar
SKU: 1172533-GEN
Price: 47.00 USD
Availability: InStock

SKU: 1172533-GEN Brand: Tempstar

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Overview

This OEM hot surface igniter (part #1172533) lights the burners on your Tempstar T8MPT125J20B1 two-stage gas furnace. On each heat call, the control board energizes the igniter until it glows hot enough to ignite gas as the valve opens. This kit pairs with the matched two-stage Honeywell gas valve (part #1172822, VR8205Q) used on this platform — a complete ignition solution for hard-to-light or no-heat calls. Hot surface igniters are fragile and wear out from repeated thermal cycling, eventually cracking or failing to reach ignition temperature. The result is a furnace that runs the inducer and opens the valve but never lights, then locks out after several failed tries. This genuine OEM igniter restores the correct resistance, glow temperature, and bracket fit for your unit.

Specifications

Spec	Value
Part Number	1172533 (Igniter HSI)
Companion Part	1172822 — 2-Stage Gas Valve (Honeywell VR8205Q)
Type	Hot Surface Igniter
Brand	Tempstar (ICP / Heil)
Application	2-Stage Furnace Ignition
Fits Model	T8MPT125J20B1

Compatibility

Designed for the Tempstar T8MPT125J20B1 two-stage gas furnace and compatible across ICP-family furnaces (Heil, Comfortmaker, Arcoaire) that share this HSI and VR8205Q gas valve platform. Match the bracket, connector, 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, then verify zero voltage with a multimeter.
Access — Remove the burner-compartment service panel.
Document — Photograph the igniter position, bracket, and wire harness before disconnecting.
Remove — Unplug the igniter connector, remove the mounting screw, and withdraw the old igniter without touching the element.
Install — Mount the new igniter handling it only by the ceramic base, reconnect the harness, and verify burner alignment.
Test — Restore gas and power, run a heat call, and confirm a clean glow, ignition, and stable two-stage operation.

Signs You Need a Replacement

Inducer and gas valve cycle but burners never ignite
Cracked igniter element or no visible glow
Repeated ignition-failure lockouts
Intermittent ignition or short-cycling on heat calls

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

Tempstar Hot Surface Igniter for...

$47.00

Frequently Asked Questions

Does this Igniter fit my Tempstar T8MPT125J20B1 — HSI Kit | Ships Today?

Yes. This is the factory-specified OEM igniter for the Tempstar T8MPT125J20B1 — HSI Kit | Ships Today. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the igniter on my Tempstar T8MPT125J20B1 — HSI Kit | Ships Today?

Difficulty: Medium (20–30 min)
Step 1: Turn off power and gas. Step 2: Open furnace panel. Step 3: Locate igniter near burners. Step 4: Disconnect two-wire plug. Step 5: Remove mounting screw. Step 6: Install new igniter — do NOT touch element with fingers. Step 7: Reconnect, close panel, restore power/gas.

My furnace won’t ignite. What part is bad?

Furnace won’t ignite after the draft inducer runs = failed igniter. The hot surface igniter should glow bright orange within 60 seconds. No glow = cracked/burned out. Weak glow = degrading. Average lifespan: 3–7 years. Replacement: $15–$40 DIY.

Is this igniter compatible with Bryant or Payne too?

Many Tempstar parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Tempstar igniter?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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