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OEM Lennox Flame Sensor — 32M86
Lennox

OEM Lennox Flame Sensor — 32M86

SKU: LNX-32M86 Brand: Lennox
$19.95 $26.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The genuine OEM Lennox 32M86 flame sensor is a critical safety component that confirms a flame is present after your burners ignite. Using flame rectification, it sends a small microamp signal back to the control board — if no flame is detected, the board immediately shuts off the gas valve to prevent unburned gas from accumulating in your Lennox furnace.

Common failure symptoms: A dirty, corroded, or failing 32M86 flame sensor typically causes the furnace to light and then shut down after a few seconds, often repeating in short-cycle bursts. You may also see ignition lockout after several failed attempts, intermittent no-heat calls, or a flame-sense fault code. Oxidation buildup on the rod weakens the signal until the board can no longer verify the flame.

Why OEM matters: The 32M86 is manufactured to Lennox's exact rod length, alloy, and mounting geometry so it sits at the correct position in the burner flame for a strong, stable microamp reading. Generic sensors often misread the signal, leading to nuisance lockouts. Choosing the factory-original part ensures dependable flame detection, safe operation, and full compatibility with your Lennox control board.

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

Frequently Asked Questions

Does this Flame Sensor fit my Lennox OEM Lennox Flame Sensor — 32M86?
Yes. This is the factory-specified OEM flame sensor for the Lennox OEM Lennox Flame Sensor — 32M86. 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 flame sensor on my Lennox OEM Lennox Flame Sensor — 32M86?
Difficulty: Easy (10–15 min)
Step 1: Turn off power/gas. Step 2: Open furnace panel. Step 3: Locate flame sensor rod near burners. Step 4: Remove single mounting screw. Step 5: Clean rod with 400-grit sandpaper until shiny (or replace). Step 6: Reinstall and tighten. Most common furnace repair — saves $150–$300 vs technician.
My furnace lights then shuts off after a few seconds. Why?
Furnace lights then shuts off after 3–10 seconds = dirty flame sensor in 90% of cases. The sensor can’t detect flame through oxidation buildup. Fix: clean with 400-grit sandpaper (free, 15 min). If cleaning doesn’t work, replace the sensor.
Is this flame sensor 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 flame sensor?
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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Mike Rivera
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