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The flame sensor is a single metal rod that confirms your burners have ignited. On the Carrier PG8DAA036095AAJA gas pack, the control board sends a small current through this rod to prove flame via flame rectification. As the rod accumulates oxide or carbon, or the alloy fatigues, the board loses its flame signal and closes the gas valve within seconds. The telltale symptoms are burners that light and then extinguish after 2-7 seconds, a furnace that short-cycles, heat that comes and goes or stops completely, and a hard lockout after several failed ignition attempts. This is a single-rod flame rectification sensor. A clean, properly positioned rod produces roughly 1-6 microamps of DC current; anything under about 0.5 µA causes the board to drop the call for heat. The rod is a high-temperature stainless/Kanthal alloy built for continuous direct flame exposure, and its output is checked with a meter wired in series on the microamp scale. OEM matters because the rod's length, alloy, and mounting bracket position the tip precisely within the flame. Generic sensors with shorter rods or substitute metals read lower current, oxidize sooner, and cause nuisance lockouts even when combustion is normal. Install difficulty: 2/5. Tools: 1/4" nut driver, fine emery cloth or steel wool for cleaning the rod, and a microamp-capable multimeter. #1 safety warning: turn off the gas supply and kill power at the breaker before removing the sensor — never work on it while the gas valve is energized. 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 PG8DAA036095AAJA. 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.