OEM Carrier Gas Furnace Flame Sensor Rod for PG8UAA066111ADJA

Mounted at the end of the burner assembly, the flame sensor is a single rod that verifies the burners actually ignited and stayed lit. It relies on flame rectification: the live flame conducts a small DC microamp current from the rod to ground, and the furnace control board reads that current as proof of flame. When the rod's tip becomes coated with oxide or silica scale, the signal weakens; once it falls below the board's threshold, the board de-energizes the gas valve within a few seconds to prevent raw gas from accumulating. To a homeowner this looks like a furnace that ignites, runs briefly, then shuts down and retries — repeated short-cycling that ends in a hard lockout and no heat. A healthy flame-sense signal on this Carrier furnace runs roughly 2-6 microamps DC with the burners lit, dropping toward lockout below about 0.5 µA. The rod is made from a high-temperature alloy that resists scaling and is shaped to keep its tip in the hottest, most ionized part of the flame for a stable reading. This OEM rod reproduces the exact length, mounting bracket, and insulator the original used. OEM matters because flame rectification is sensitive to rod position and metallurgy. Generic sensors that sit slightly out of the flame or use cheaper alloy oxidize quickly and produce a marginal signal, leading to intermittent lockouts that are easy to misdiagnose as a bad control board. Install difficulty: 1 of 5. Tools: a 1/4" nut driver, fine steel wool or emery cloth for cleaning, and a multimeter that reads microamps DC. Safety first — turn off furnace power and the gas supply before removing the rod, and let the burner compartment cool. 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 PG8UAA066111ADJA. 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.