What igniter fits my Tempstar furnace?

The correct replacement for Tempstar model T8MPL125J20B1 — HSI Furnace Ignitor | 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 T8MPL125J20B1 — HSI Furnace Ignitor | 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 T8MPL125J20B1 — HSI Furnace Ignitor | Ships Today

Name: Tempstar Hot Surface Igniter for T8MPL125J20B1 — HSI Furnace Ignitor | Ships Today
Brand: Tempstar
SKU: 1172533-GEN
Price: 38.95 USD
Availability: InStock

SKU: 1172533-GEN Brand: Tempstar

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Overview

This OEM hot surface igniter (HSI, part #1172533) is the component that glows red-hot to light the burners on your Tempstar T8MPL125J20B1 furnace. On each heat call, the control board energizes the igniter; once it reaches ignition temperature the gas valve opens and the burners light. Hot surface igniters are the most common furnace heating failure — the brittle silicon-carbide or nitride element cracks from thermal cycling or contamination from oily fingerprints. Symptoms include the furnace blower running with no heat, a clicking gas valve that never lights, or a visible glow that is dim or absent. This combo page also references the matching OEM gas valve (part #1172821, VR8205S snap-mount) for systems needing both at once.

Specifications

Spec	Value
Part Number	1172533 (Igniter)
Companion Part	1172821 — Gas Valve, HSI Snap, Honeywell VR8205S
Type	Hot Surface Igniter (HSI)
Brand	Tempstar (ICP / Heil / Comfortmaker)
Application	Gas Furnace Burner Ignition

Compatibility

Direct OEM fit for the Tempstar T8MPL125J20B1 gas furnace and ICP-family equipment (Heil, Comfortmaker, Arcoaire, Keeprite) that specifies igniter 1172533. Verify your furnace's existing igniter part number and connector style before installing.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker and confirm zero voltage with a multimeter.
Access — Remove the burner-compartment access panel.
Document — Photograph the igniter mounting position and wiring connector before disconnecting.
Remove — Unplug the igniter harness, remove the mounting screw(s), and lift the fragile element out — never touch the new element with bare fingers.
Install — Mount the new igniter in the same orientation, reconnect the harness, and confirm it sits correctly over the burner.
Test — Restore power, initiate a heat call, and confirm the igniter glows and the burners light promptly.

Signs You Need a Replacement

Blower runs but no heat is produced
Igniter does not glow, or glows dim/uneven
Visible crack or break in the igniter element
Furnace locks out after several failed ignition attempts

Shipping & Returns

Ships same day on orders placed 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...

$38.95

Frequently Asked Questions

Does this Igniter fit my Tempstar T8MPL125J20B1 — HSI Furnace Ignitor | Ships Today?

Yes. This is the factory-specified OEM igniter for the Tempstar T8MPL125J20B1 — HSI Furnace Ignitor | 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 T8MPL125J20B1 — HSI Furnace Ignitor | 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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