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OEM Carrier Flame Sensor Replacement for Model LC350LC400678
Carrier

OEM Carrier Flame Sensor Replacement for Model LC350LC400678

SKU: carrier-undefined-lc350lc400678 Brand: Carrier
$19.95

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 Replacement for Model LC350LC400678

This genuine OEM Carrier flame sensor detects the burner flame and signals the control board to maintain gas flow for continuous, reliable heating. When the sensor is dirty, oxidized, or worn out, the furnace ignites and then shuts off within seconds, causing repeated short cycling and inconsistent warmth. This factory-spec replacement is precision-matched to Carrier model LC350LC400678, delivering proper flame rectification and a strong microamp signal for safe operation. Manufactured to OEM tolerances, it restores accurate flame detection and ends frustrating nuisance lockouts. Installation is one of the simplest furnace repairs—generally 15-20 minutes with a single mounting screw and one wire connector, well suited to a careful DIYer, though a licensed professional is recommended if you have any doubt. Enjoy steady, dependable heat with a component engineered to factory standards instead of a generic alternative. Every order placed before 3PM CST ships same-day, returning your Carrier furnace to service quickly. Trust authentic OEM quality for safe, consistent flame sensing all heating season long.

Compatibility

This part is compatible with Carrier model LC350LC400678.

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 LC350LC400678?
Yes. This is the factory-specified OEM flame_sensor for the Carrier Model LC350LC400678. 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 LC350LC400678?
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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