Same-day shipping on orders before 3PM CST · 15,000+ OEM Parts In Stock · Carrier · Bryant · ICP · Heil · Tempstar
Track Order | 1-800-NHP-HVAC | Trade Accounts

Menu

Home Shop All Account Cart
Home / OEM Carrier Flame Sensor LH33ZS003 fo...
OEM Carrier Flame Sensor LH33ZS003 for Model LC348TM402290 Furnace
Carrier

OEM Carrier Flame Sensor LH33ZS003 for Model LC348TM402290 Furnace

SKU: carrier-undefined-lc348tm402290 Brand: Carrier
$24.95

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

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

OEM Carrier Flame Sensor LH33ZS003 for Model LC348TM402290 Furnace

This OEM Carrier flame sensor (part LH33ZS003) is the safety component that confirms burner ignition in your Carrier LC348TM402290 furnace. It generates a microamp signal proving flame is present; without it, the control board shuts off gas as a safety measure, causing short-cycling, no-heat calls, or repeated lockouts. A weak, cracked, or carbon-fouled flame sensor is one of the most common causes of intermittent heating failures. This direct-replacement rod restores reliable flame proving and steady furnace operation. Engineered to exact Carrier specifications, it ensures correct rod length, mounting, and electrical signal for the LC348TM402290. Installation is easy — a 15-minute job for most homeowners and a routine swap for any technician: shut off power, remove one screw, unplug the lead, and reverse. No recalibration required. Genuine Carrier quality means proper fit and long service life. In stock and ships same-day on orders placed before 3PM CST. Keep your furnace running safely through every heating season with the correct OEM flame sensor.

Compatibility

This part is compatible with Carrier model LC348TM402290.

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 LC348TM402290 Furnace?
Yes. This is the factory-specified OEM flame_sensor for the Carrier Model LC348TM402290 Furnace. 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 LC348TM402290 Furnace?
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.
Home Shop Search Account Cart