OEM Carrier Flame Sensor LH680013 for Model PG9MAB036040ABSA

This is the genuine OEM replacement flame sensor (part number LH680013) factory-specified for the Carrier PG9MAB036040ABSA gas furnace. The flame sensor — also called a flame rod — is a safety device that detects whether a burner flame is actually present after the gas valve opens. It generates a small microamp DC signal through the flame and back to the control board to confirm ignition. When the sensor is coated with oxidation or carbon buildup, that signal drops below the board's detection threshold, causing the furnace to light briefly and then shut off on safety lockout — typically within 5 to 8 seconds of ignition. Replacing with a genuine OEM sensor restores factory-calibrated signal conductivity and eliminates nuisance lockouts.

• Part Number: LH680013 | Genuine Carrier OEM — no cross-compatibility guesswork, exact factory fit and rod geometry
• OEM vs Generic: OEM sensors use the correct rod alloy and bracket angle specified for this furnace's burner assembly. Generic sensors may have incorrect rod length, bracket offsets, or inferior rod coatings that degrade faster and trigger premature lockout faults.
• Install Difficulty: 2/5 — Turn off gas supply and 120V power at the disconnect before beginning. Tools needed: 1/4" hex driver or nut driver, needle-nose pliers, and a multimeter capable of reading microamps (µA) to verify the signal post-install (healthy flame signal: 2–6 µA DC). Lightly sand the rod with fine steel wool if reinstalling a used sensor.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Engineered for the Carrier PG9MAB036040ABSA packaged gas furnace. Always cross-reference the part number on your existing sensor or confirm with your unit's wiring diagram before ordering. If you're unsure of fitment, our HVAC parts team is available to verify compatibility before you buy — no returns needed.