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The flame sensor is a single metal rod that sits directly in the burner flame path of your Carrier PY3PNA024060AA packaged unit. It performs flame rectification, proving to the control board that the burners actually lit. When it becomes coated with silica and oxide buildup or cracks, the board can no longer detect the flame and shuts the gas valve within seconds as a safety lockout. Homeowners notice the furnace lighting for 3 to 7 seconds and then shutting off over and over (short-cycling on ignition), burners going out right after they light, and eventually a hard lockout with no heat on cold mornings. This is a genuine OEM single-rod sensor with a high-temperature stainless sensing element and ceramic insulator rated for continuous burner exposure. A healthy sensor passes a microamp flame-rectification current (typically 1 to 6 microamps DC) back to the control; readings below about 0.5 microamps cause dropout. The rod length, bracket spacing, and quick-connect terminal match factory geometry so flame impingement and signal strength stay within Carrier spec. Flame sensors look simple, but rod length, alloy, and bracket angle determine how much of the rod sits in the flame and therefore the microamp signal. Generic rods often use thinner or lower-grade alloy that oxidizes faster and sits at the wrong depth, producing weak or noisy signals that cause nuisance lockouts months later. The OEM rod holds the correct flame position and signal strength for reliable long-term ignition. Install difficulty: 2 of 5. Tools: 1/4-inch nut driver, fine emery cloth or steel wool, and an optional multimeter (microamp DC). Safety: turn off both the gas supply and the 24V/line power at the disconnect before reaching into the burner compartment. Remove the single screw, unplug the lead, swap, and reseat. 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 PY3PNA024060AA. 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.