OEM Carrier Furnace Flame Sensor LH680534 for PG8UAA024045ACJA

The LH680534 flame sensor is the safety device that proves a flame is actually present in your Carrier PG8UAA024045ACJA furnace. It's a single metal rod that sits in the burner flame and uses flame rectification — the burning gas conducts a tiny microamp DC current that tells the control board the burners lit. When the rod gets coated with oxide and silica buildup, that current drops and the board can no longer "see" the flame, so it shuts the gas off as a safety measure. The trademark symptom: the furnace lights for 3–7 seconds, then the flame snaps off and the inducer keeps running, repeating two or three times before the unit locks out. You get short bursts of warm air followed by no heat, often worst on the coldest days when the furnace runs most. Specs: this is a single-rod sensing electrode with a high-temperature ceramic insulator and a spade or screw terminal. A healthy sensor passes roughly 2–6 microamps of flame current; below about 0.5–1 µA the board declares loss of flame. The rod alloy and insulator are rated for continuous direct flame contact. Why OEM matters: generic rods use lower-grade alloys and insulators that oxidize faster and crack from thermal cycling, so flame current degrades again within a season. The genuine LH680534 holds a stable microamp signal far longer. Install difficulty: 1 of 5. Tools: 1/4" nut driver, fine emery cloth or steel wool, and ideally a multimeter set to DC microamps to verify flame current. SAFETY: turn off the gas and kill the breaker before removing the sensor, and let the burner assembly cool first. Ships same business day from our stocked warehouse on orders placed before 3 PM CST. Backed by a 1-year OEM warranty and 30-day hassle-free returns on uninstalled parts.

Compatibility

This part is compatible with Carrier model PG8UAA024045ACJA. Always verify the part number against your unit's data plate before ordering.

Why Choose OEM?

OEM parts are manufactured to the exact factory specifications for your unit. Generic aftermarket alternatives may fit physically but often use lower-rated components that reduce equipment life and void manufacturer warranties. When the cost difference between OEM and generic is $10-30, the OEM part is always the smarter investment on a system worth $5,000-$15,000.

Shipping & Returns

Same-day shipping on orders before 3 PM CST. Standard delivery 2-5 business days, express options available at checkout. 30-day hassle-free returns on uninstalled parts — free return shipping included. 1-year OEM factory warranty coverage.