What igniter fits my Tempstar furnace?

The correct replacement for Tempstar model T8MPN125J20A1 — Igniter/Sensor SK | 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 T8MPN125J20A1 — Igniter/Sensor SK | 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 T8MPN125J20A1 — Igniter/Sensor SK | Ships Today

Name: Tempstar Hot Surface Igniter for T8MPN125J20A1 — Igniter/Sensor SK | Ships Today
Brand: Tempstar
SKU: 1009524-GEN
Price: 39.00 USD
Availability: InStock

SKU: 1009524-GEN Brand: Tempstar

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Overview

This OEM hot surface igniter and sensor kit (part number 1009524, IGNITOR/SENSOR HSP SK) provides reliable ignition for your Tempstar T8MPN125J20A1 gas furnace. On a call for heat, the igniter glows white-hot to ignite the burner gas; the integrated sensor confirms flame so the control board keeps the gas valve open. Igniters are brittle and degrade with every heating cycle, making them a frequent furnace failure point. Common symptoms include a furnace that clicks and tries to start but never lights, short-cycling on flame failure (lockout), or no visible glow at the igniter during the ignition sequence. Never touch the silicon carbide/nitride element with bare hands — skin oils create hot spots that shorten its life.

Specifications

Spec	Value
Part Number	1009524
Type	Hot Surface Igniter / Sensor Kit (HSP SK)
Brand	Tempstar
Voltage	120V
Function	Ignition + Flame Sense

Compatibility

Direct OEM fit for the Tempstar T8MPN125J20A1 gas furnace and related ICP/Heil/Tempstar/Comfortmaker furnaces using the 1009524 hot surface igniter kit. Verify the existing igniter part number and mounting style before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, and verify zero voltage with a multimeter.
Access — Remove the burner compartment service panel.
Document — Photograph the igniter bracket position and wire harness routing before disconnecting.
Remove — Unplug the igniter connector, remove the mounting screw(s), and carefully withdraw the old igniter without flexing the element.
Install — Mount the new igniter handling it only by the ceramic base, reconnect the harness per your photo.
Test — Restore power, initiate a heat call, and confirm the igniter glows and the burner lights and stays lit.

Signs You Need a Replacement

Furnace tries to ignite but burner never lights
No glow from the igniter during the ignition sequence
Cracked or visibly damaged igniter element
Repeated ignition-failure lockouts

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...

$39.00

Frequently Asked Questions

Does this Igniter fit my Tempstar T8MPN125J20A1 — Igniter/Sensor SK | Ships Today?

Yes. This is the factory-specified OEM igniter for the Tempstar T8MPN125J20A1 — Igniter/Sensor SK | 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 T8MPN125J20A1 — Igniter/Sensor SK | 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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