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The flame sensor in your Carrier PG92 furnace is a single metal rod positioned directly in the burner flame to confirm the burners ignited. It operates on flame rectification: the control board passes a small AC signal through the rod, the ionized flame converts it to a tiny DC microamp current, and the board uses that current as proof of flame. Without it, the board closes the gas valve in seconds. As the rod fouls with oxide or carbon, homeowners see the telltale pattern — the furnace lights, burns for only a few seconds, then drops out, retries two or three times, and finally locks out cold with no heat. This rod produces a flame-rectification signal usually in the 1–6 microamp (µA) range, and most controls require roughly 0.5–1 µA minimum to keep the gas valve energized. It is built from a high-temperature alloy and mounted at a precise depth and angle so the tip stays in the flame; a healthy sensor reads very high resistance to ground, while a low reading signals a cracked porcelain insulator. OEM matters because the rod's length, bend, and alloy are tuned to your specific burner. Generic rods frequently use cheaper metal that oxidizes quickly, so the microamp signal fades and short-cycling returns within months, and incorrect geometry leaves the tip outside the flame, causing chronic nuisance lockouts. Install difficulty: 1 of 5. Tools needed: 1/4" nut driver, fine steel wool or emery cloth, and a multimeter that reads microamps. Safety warning: shut off the furnace power at the breaker before reaching near the burners, and allow the burner assembly to cool — this rod sits directly in open flame. 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.
This part is compatible with Carrier model PG92SBS66100CBAA. Always verify the part number against your unit's data plate before ordering.
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.
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.