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OEM Carrier Flame Sensor LC350TM400621 for Model LC350TM400621
Carrier

OEM Carrier Flame Sensor LC350TM400621 for Model LC350TM400621

SKU: carrier-undefined-lc350tm400621 Brand: Carrier
$24.95

Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.

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OEM Carrier Flame Sensor LC350TM400621 for Model LC350TM400621

This OEM Carrier flame sensor is the rectification probe that proves your burner has lit and tells the control board to keep gas flowing safely. Engineered for Carrier model LC350TM400621, it sits directly in the flame path and produces the microamp current the furnace needs to hold its gas valve open through each heating cycle. A dirty or failed flame sensor is the leading cause of furnaces that ignite and then shut off seconds later, short-cycling until they lock out and leave you without heat. Replacing it is one of the simplest furnace repairs you can do yourself: cut power, remove a single mounting screw, disconnect the wire lead, and install the new probe in minutes with basic hand tools. Genuine OEM construction guarantees the correct length, alloy, and signal output so your furnace proves flame reliably every time. End nuisance lockouts and restore steady, even heat with a factory-spec part. In stock and ships same-day when you order before 3PM CST.

Compatibility

This part is compatible with Carrier model LC350TM400621.

Shipping

Same-day shipping before 3 PM CST. 30-day returns on uninstalled parts.

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 support@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this flame_sensor fit my Carrier Model LC350TM400621?
Yes. This is the factory-specified OEM flame_sensor for the Carrier Model LC350TM400621. 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 Carrier Model LC350TM400621?
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 Carrier 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 Carrier 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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