What igniter fits my Tempstar furnace?

The correct replacement for Tempstar model T8MPN125J20B2 — 120V HSI | 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 T8MPN125J20B2 — 120V HSI | 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 T8MPN125J20B2 — 120V HSI | Ships Today

Name: Tempstar Hot Surface Igniter for T8MPN125J20B2 — 120V HSI | Ships Today
Brand: Tempstar
SKU: 1172533-GEN
Price: 26.95 USD
Availability: InStock

SKU: 1172533-GEN Brand: Tempstar

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Overview

This OEM hot surface igniter (HSI), part number 1172533, is the original ignition component for the Tempstar T8MPN125J20B2 gas furnace. The igniter receives 120V from the furnace control board during the heating call and glows white-hot to ignite the gas at the burners. It is one of the most common wear items in a modern furnace — the brittle silicon-carbide element degrades with every ignition cycle and eventually cracks or fails to reach temperature. When the igniter fails, the furnace blower may run but produce no heat, and the control board often locks out after several failed ignition attempts. Replacing the igniter with a genuine OEM unit restores reliable, on-demand ignition.

Specifications

Spec	Value
Part Number	1172533
Type	Hot Surface Igniter (HSI)
Brand	Tempstar
Voltage	120V
Application	Gas Furnace Ignition
Fitment	OEM Replacement

Compatibility

Engineered as a direct-fit replacement for the Tempstar T8MPN125J20B2 furnace and shared-platform Heil, ICP, and Comfortmaker models that use the same ignition assembly. Always confirm your furnace's part number against 1172533 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 lower service panel to expose the burner assembly.
Document — Photograph the igniter wiring and mounting bracket before disconnecting.
Remove — Unplug the igniter connector and remove the mounting screw. Handle the old igniter only by its ceramic base — never touch the element.
Install — Mount the new igniter so the element sits in the burner flame path without touching metal, then reconnect the plug.
Test — Restore gas and power, then start a heat cycle and confirm the igniter glows and lights the burners cleanly.

Signs You Need a Replacement

Furnace blower runs but produces no heat
Igniter does not glow, or glows dimly/unevenly
Control board locks out after repeated failed ignition attempts
Visible cracks or chips 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

Tempstar Hot Surface Igniter for...

$26.95

Frequently Asked Questions

Does this Igniter fit my Tempstar T8MPN125J20B2 — 120V HSI | Ships Today?

Yes. This is the factory-specified OEM igniter for the Tempstar T8MPN125J20B2 — 120V HSI | 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 T8MPN125J20B2 — 120V HSI | 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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