What igniter fits my Tempstar furnace?

The correct replacement for Tempstar model TDE125J20G1 — 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 TDE125J20G1 — 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 & Sensor for TDE125J20G1 — Silicon Nitride HSI | Ships Today

Name: Tempstar Hot Surface Igniter & Sensor for TDE125J20G1 — Silicon Nitride HSI | Ships Today
Brand: Tempstar
SKU: 1009524-GEN
Price: 39.00 USD
Availability: InStock

SKU: 1009524-GEN Brand: Tempstar

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Overview

This is the genuine OEM hot surface igniter and flame sensor (part number 1009524) for the Tempstar TDE125J20G1 furnace. The hot surface igniter (HSI) glows to roughly 2,000°F on each call for heat to light the burners, and the integrated sensor confirms flame so the gas valve stays open. This silicon-nitride-style HSP igniter is the most common point of failure in a modern furnace: the element is brittle and degrades with every cycle. When it cracks or its resistance drifts, the furnace blows cold air, locks out after several ignition attempts, or short-cycles. A failed flame-sense function will light the burners and then shut them off within seconds. Installing the factory igniter/sensor restores reliable ignition and flame proving.

Specifications

Spec	Value
Part Number	1009524
Description	Ignitor/Sensor HSP SK
Type	Hot Surface Igniter with Flame Sensor
Element	Silicon Nitride (SK style)
Brand	Tempstar
Fits Model	TDE125J20G1
Fitment	OEM Direct Replacement

Compatibility

Direct OEM fit for the Tempstar TDE125J20G1 and matching ICP/Heil/Comfortmaker gas furnaces using the SK-style hot surface igniter/sensor. Confirm the igniter style and mounting bracket against your existing part before ordering.

Installation Guide

Safety First — Shut off gas and disconnect power at the furnace switch; verify zero voltage before working.
Access — Remove the burner compartment door to expose the igniter at the burner assembly.
Document — Photograph the igniter bracket position and the wire/connector routing before disconnecting.
Remove — Unplug the igniter harness, remove the mounting screw, and carefully withdraw the brittle igniter without touching the element.
Install — Seat the new igniter (handle by the ceramic base only), secure the bracket, and reconnect the harness per your photo.
Test — Restore gas and power, call for heat, and confirm the igniter glows, burners light, and flame is proven without lockout.

Signs You Need a Replacement

Furnace blows cold air and never lights the burners
Control board locks out after three or more failed ignition attempts
Igniter does not glow, or has a visible crack or blister
Burners light then shut off within seconds (lost flame sense)

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 & S...

$39.00

Frequently Asked Questions

Does this Igniter fit my Tempstar TDE125J20G1 — Silicon Nitride HSI | Ships Today?

Yes. This is the factory-specified OEM igniter for the Tempstar TDE125J20G1 — 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 TDE125J20G1 — 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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