What igniter fits my Tempstar furnace?

The correct replacement for Tempstar model TDE125J20B1 — Silicon Nitride 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 TDE125J20B1 — Silicon Nitride 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 TDE125J20B1 — Silicon Nitride HSI | Ships Today

Name: Tempstar Hot Surface Igniter for TDE125J20B1 — Silicon Nitride HSI | Ships Today
Brand: Tempstar
SKU: 1009524-GEN
Price: 39.95 USD
Availability: InStock

SKU: 1009524-GEN Brand: Tempstar

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Overview

This OEM hot surface igniter (HSI), part number 1009524, is the ignition component for the Tempstar TDE125J20B1 gas furnace. On a call for heat, the control board sends 120V to the igniter, which heats to roughly 2,000°F and ignites the gas at the burners. This is a silicon nitride style igniter/sensor (HSP SK) — more durable and shock-resistant than older silicon carbide elements. A failed igniter is the single most common reason a furnace stops producing heat: the inducer runs and the board calls for ignition, but the burners never light, leaving the unit blowing cold air or locking out.

Specifications

Spec	Value
Part Number	1009524
Description	Igniter/Sensor HSP SK
Type	Hot Surface Igniter (Silicon Nitride)
Brand	Tempstar
Voltage	120V
Fitment	OEM Replacement

Compatibility

Engineered for the Tempstar TDE125J20B1 gas furnace and shared across many ICP / Heil / Comfortmaker / Tempstar platforms that use the 1009524 igniter assembly. Always confirm the part number on your existing igniter before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter and shut off the gas.
Access — Remove the burner compartment service panel.
Document — Photograph the igniter bracket and wiring before disconnecting.
Remove — Unplug the igniter harness, remove the mounting screw, and lift the old igniter out without touching the fragile element.
Install — Seat the new igniter, secure the screw, and reconnect the harness exactly as photographed. Handle the ceramic by the base only.
Test — Restore gas and power and watch a full ignition cycle to confirm the burners light and stay lit.

Signs You Need a Replacement

Furnace blows cold air and burners never ignite
Visible cracks, breaks, or whitened spots on the igniter element
Igniter glows weakly or not at all on a call for heat
Furnace locks out after several failed ignition attempts

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...

$39.95

Frequently Asked Questions

Does this Igniter fit my Tempstar TDE125J20B1 — Silicon Nitride HSI | Ships Today?

Yes. This is the factory-specified OEM igniter for the Tempstar TDE125J20B1 — Silicon Nitride 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 TDE125J20B1 — Silicon Nitride 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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