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OEM Lennox Flame Sensor — 44L48
Lennox

OEM Lennox Flame Sensor — 44L48

SKU: LNX-44L48 Brand: Lennox
$19.95 $26.95

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Texas CMBL #19328542014
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The genuine OEM Lennox 44L48 flame sensor is a critical safety component in your gas furnace. It uses flame rectification to confirm that the burner has actually lit after the ignition sequence, signaling the control board to keep the gas valve open. If it detects no flame, the furnace safely shuts off the gas supply to prevent a hazardous buildup. This sensor is engineered for direct compatibility with Lennox furnaces that specify part number 44L48.

Common failure symptoms: A dirty, oxidized, or failing 44L48 flame sensor typically causes the furnace to light briefly and then shut off after a few seconds — a condition known as short-cycling. You may also experience the system locking out after several failed ignition attempts, intermittent no-heat calls, or the blower running with no warm air.

Why OEM matters: Lennox designs the 44L48 to precise electrical and dimensional specifications so the microamp signal it returns falls within the range the furnace control board expects. Aftermarket substitutes can produce weak or inconsistent flame signals, leading to nuisance lockouts and unreliable heating. Choosing the OEM part ensures proper fit, correct flame current, and dependable operation season after season.

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 — 44L48?
Yes. This is the factory-specified OEM flame sensor for the Lennox OEM Lennox Flame Sensor — 44L48. 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 — 44L48?
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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