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Lennox

OEM Lennox Freezestat Coil Sensor Kit — 91W70

SKU: LNX-91W70 Brand: Lennox
$39.95 $54.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The genuine OEM Lennox 91W70 freezestat kit (T2SNSR70LN1) is a temperature-sensing safety control that monitors evaporator coil temperature and interrupts operation before ice can form. Mounted to the coil, it protects your Lennox system from liquid refrigerant floodback, restricted airflow damage, and the efficiency losses that follow a frozen coil. It is engineered for direct compatibility with Lennox equipment that specifies this freeze-protection component.

Common failure symptoms: a coil that ices over during operation, nuisance system shutdowns, the unit failing to restart after a freeze event, or a compressor that short-cycles. A drifted or open sensor may also cause the control board to lock out cooling entirely.

Why OEM matters: Lennox freeze controls are calibrated to precise trip and reset temperatures. An OEM 91W70 guarantees the correct set points, connector, and probe geometry so the safety functions exactly as the factory intended — protecting your compressor and coil investment. Aftermarket substitutes often trip early or late, leaving equipment unprotected.

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 Freezestat Coil Sensor Kit — 91W70?
Yes. This is the factory-specified OEM sensor for the Lennox OEM Lennox Freezestat Coil Sensor Kit — 91W70. 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 Freezestat Coil Sensor Kit — 91W70?
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.
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Mike Rivera
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