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The flame sensor is the safety device that proves a flame is actually present after your Carrier furnace ignites. It works by flame rectification: the burner flame conducts a tiny DC current between the sensor rod and ground, and the control board uses that signal to keep the gas valve energized. When the rod becomes coated with oxide or carbon, or the rod itself cracks, the board can no longer detect the flame and shuts the gas off as a safety response. Homeowners typically notice the furnace lighting for three to five seconds and then shutting down, repeating on a short cycle, or dropping into a hard lockout with no heat after several failed tries. Specs: this is a single-rod Kanthal/stainless flame-rectification sensor. A healthy sensor on this platform reads a flame-current signal in the 1-6 microamp DC range; anything under roughly 0.5 microamps causes intermittent flame-loss faults. The rod and ceramic insulator are rated for continuous burner-flame temperatures and mount with a standard hex screw. OEM matters here because the rod alloy and insulator quality directly affect the microamp signal the board needs. Generic sensors often use thinner or differently-plated rods that oxidize faster and drift out of the board's detection window, recreating the exact intermittent shutdowns you are trying to fix. An OEM rod holds a clean, stable signal far longer. Install difficulty: 1 of 5. Tools: 1/4" nut driver, fine steel wool or emery cloth, and a multimeter capable of reading DC microamps to verify flame current. #1 safety warning: shut off the gas at the manual valve and kill power to the furnace 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 PG8JEB036070AAJA. 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.