What igniter fits my Tempstar furnace?

The correct replacement for Tempstar model T8DNL125L20B1 — Silicon Carbide 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 T8DNL125L20B1 — Silicon Carbide 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 T8DNL125L20B1 — Silicon Carbide HSI | Ships Today

Name: Tempstar Hot Surface Igniter for T8DNL125L20B1 — Silicon Carbide HSI | Ships Today
Brand: Tempstar
SKU: 1172533-GEN
Price: 36.00 USD
Availability: InStock

SKU: 1172533-GEN Brand: Tempstar

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Overview

This OEM hot surface igniter (HSI), Tempstar part number 1172533, is the ignition component for the T8DNL125L20B1 gas furnace. When the thermostat calls for heat and the gas valve opens, the control board sends 120V to the igniter, which glows red-hot to light the burners. Hot surface igniters are the most common failure point in modern furnaces — the brittle silicon-carbide element cracks from repeated thermal cycling, contamination, or rough handling. A failed igniter is the usual cause of a furnace that runs the inducer and blower but never produces heat, or one that locks out after several ignition attempts.

Specifications

Spec	Value
OEM Part Number	1172533
Type	Hot Surface Igniter (HSI)
Brand	Tempstar / Heil / ICP
Element	Silicon Carbide
Voltage	120V
Application	Gas Furnace Burner Ignition

Compatibility

Engineered as a direct-fit replacement for the Tempstar T8DNL125L20B1 furnace. Also fits many related ICP-family models (Heil, Comfortmaker, Arcoaire) that share the 1172533 igniter assembly and bracket. Always confirm your existing igniter part number before ordering.

Installation Guide

Safety First — Shut off the gas and disconnect electrical power at the furnace switch and breaker. Verify zero voltage with a multimeter.
Access — Remove the furnace burner-compartment service panel.
Document — Photograph the igniter's wiring connector and mounting orientation before disconnecting.
Remove — Unplug the igniter harness, remove the mounting screw, and carefully withdraw the old igniter. Never touch the ceramic element with bare fingers — skin oils shorten its life.
Install — Seat the new igniter in the same position, secure the screw, and reconnect the harness per your photo.
Test — Restore gas and power, then run a heat cycle and confirm the igniter glows and the burners light within a few seconds.

Signs You Need a Replacement

Furnace inducer and blower run but no flame or heat.
Visible crack, blistering, or white spots on the igniter element.
Furnace locks out after 3 ignition attempts.
Igniter no longer glows when measured/observed during a heat call.

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...

$36.00

Frequently Asked Questions

Does this Igniter fit my Tempstar T8DNL125L20B1 — Silicon Carbide HSI | Ships Today?

Yes. This is the factory-specified OEM igniter for the Tempstar T8DNL125L20B1 — Silicon Carbide 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 T8DNL125L20B1 — Silicon Carbide 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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