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The flame sensor proves to your Carrier furnace that the burners actually lit. Once the gas ignites, this slender metal rod sits in the flame and rectifies a tiny microamp current back to the control board. The board keeps the gas valve open only as long as it reads that current — a critical safety function that prevents the furnace from dumping unburned gas. As the rod accumulates carbon, oxidation, or silica scale, the signal weakens and the board cuts the gas. The classic symptom is a furnace that lights for five to ten seconds, then shuts off and short-cycles repeatedly, pushing cool air and never satisfying the thermostat. This genuine OEM Carrier sensor has the exact rod length, ceramic insulator, and mounting bracket for the PG9MAA024060ABKA burner assembly. A good sensor produces a steady 1.5–6 microamps of flame current; the board typically drops out below about 0.5 µA. The high-temperature steel rod and ceramic standoff are positioned so the tip stays buried in the flame. Generic sensors often use a thinner or shorter rod and a cheaper insulator that cracks under repeated thermal cycling, causing intermittent dropouts that are very hard to chase down. A rod that sits outside the flame envelope never builds enough current. OEM keeps the metallurgy and geometry precise. Install difficulty: 2/5. Tools: 1/4" nut driver and a multimeter set to DC microamps to read flame current. SAFETY: shut off the gas valve and cut power at the breaker before removing the old sensor. Do not wire-brush a new rod — handle it by the ceramic base only. Ships same business day from our stocked warehouse on orders placed before 3 PM CST. 1-year OEM warranty and 30-day hassle-free returns on uninstalled parts.
This part is compatible with Carrier model PG9MAA024060ABKA. 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.