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The flame sensor is a single metal rod mounted in the burner assembly that confirms an actual flame is present once the gas valve opens. It works through flame rectification — a tiny microamp DC current passes from the rod, through the flame, to the burner ground. When the rod oxidizes, cracks, or carbons over, the control board can no longer detect that current and closes the gas valve within seconds as a safety lockout. Homeowners typically notice the furnace igniting for 3-7 seconds and then shutting off (short-cycling), the blower running with cold air, repeated clicking ignition attempts, or a hard lockout with no heat after 3-5 failed tries. A healthy Carrier flame sensor produces a flame-rectification signal of roughly 1-6 microamps DC; readings below about 0.5 µA trip lockout. The rod is a high-temperature Kanthal/stainless alloy that resists scaling under continuous flame contact, and the OEM rod length, bend angle, and ceramic insulator are matched to the PY2PEB burner geometry so the tip sits correctly inside the flame envelope. OEM matters here because aftermarket sensors often use thinner rod stock and lower-grade ceramic that oxidize faster and produce a weaker, unstable microamp signal — leading to nuisance lockouts even on a properly burning furnace. A correctly positioned OEM rod restores a strong, steady flame current. Install difficulty: 2/5. Tools needed: 1/4" nut driver, fine emery cloth or steel wool, and a multimeter capable of reading DC microamps. #1 safety warning: shut off the gas and kill power at the furnace disconnect switch before removing the sensor. 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 PY2PEB060115AA. 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.