Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart
OEM Lennox Mixed Air Thermistor Sensor — 10F83
Lennox

OEM Lennox Mixed Air Thermistor Sensor — 10F83

SKU: LNX-10F83 Brand: Lennox
$24.95 $34.95

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The genuine OEM Lennox 10F83 mixed air thermistor sensor measures the temperature of blended return and outdoor air so your Lennox control board and economizer can modulate dampers and staging for comfort and efficiency. Accurate temperature feedback from this sensor is essential for correct free-cooling operation and proper equipment sequencing.

Common failure symptoms: erratic or incorrect temperature readings, economizer dampers stuck open or closed, poor comfort control, fault or sensor error codes at the control board, or heating and cooling stages that cycle at the wrong times. A drifting or open thermistor sends bad data that the controls act on directly.

Why OEM matters: thermistors are calibrated to a specific resistance-versus-temperature curve that the Lennox control logic expects. The OEM 10F83 matches that curve exactly, so the board reads true temperatures — a generic sensor with a different curve produces false readings and unpredictable operation. Install the authentic Lennox 10F83 for precise sensing and full control-system compatibility.

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 Sensor fit my Lennox OEM Lennox Mixed Air Thermistor Sensor — 10F83?
Yes. This is the factory-specified OEM sensor for the Lennox OEM Lennox Mixed Air Thermistor Sensor — 10F83. 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 sensor on my Lennox OEM Lennox Mixed Air Thermistor Sensor — 10F83?
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 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 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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online