What igniter fits my Lennox furnace?

The correct replacement for Lennox model OEM Lennox Silicon Carbide Hot Surface Ignitor 4.5" Molex — 87X84 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 Lennox equipment which lists the model number OEM Lennox Silicon Carbide Hot Surface Ignitor 4.5" Molex — 87X84.

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.

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Lennox

OEM Lennox Silicon Carbide Hot Surface Ignitor 4.5" Molex — 87X84

Name: OEM Lennox Silicon Carbide Hot Surface Ignitor 4.5" Molex — 87X84
Brand: Lennox
SKU: LNX-87X84
Price: 29.95 USD
Availability: InStock

SKU: LNX-87X84 Brand: Lennox

$29.95 $39.95

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The 87X84 is a genuine OEM Lennox silicon carbide hot surface ignitor with a 4.5" lead and a Molex front-lock connector fitted with 0.092" male pins. On a call for heat, this ignitor glows to a high temperature to light the burners in your Lennox gas furnace, making it one of the most critical components in the ignition sequence. It is a direct replacement for Robertshaw/White-Rodgers 41-410.

Common failure symptoms: the furnace clicks and attempts to fire but never ignites, the blower runs cold air, the ignitor no longer glows or glows unevenly, you see hairline cracks in the silicon carbide element, or the unit locks out after several failed ignition attempts.

Silicon carbide ignitors are brittle and degrade with every heating cycle, so replacement is routine maintenance on aging systems. Choosing the OEM Lennox 87X84 ensures the correct resistance, glow temperature, and connector fit for your specific furnace — generic ignitors often mismatch the control board's timing and shorten service life. Restore reliable, safe ignition with a factory-spec part.

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

OEM Lennox Silicon Carbide Hot S...

$29.95

Frequently Asked Questions

Does this Igniter fit my Lennox OEM Lennox Silicon Carbide Hot Surface Ignitor 4.5" Molex — 87X84?

Yes. This is the factory-specified OEM igniter for the Lennox OEM Lennox Silicon Carbide Hot Surface Ignitor 4.5" Molex — 87X84. 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 Lennox OEM Lennox Silicon Carbide Hot Surface Ignitor 4.5" Molex — 87X84?

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 Lennox 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 Lennox 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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OEM Lennox Silicon Carbide Hot Surface Ignitor 4.5" Molex — 87X84

Shipping Information

Return Policy

Frequently Asked Questions