OEM Carrier Flame Sensor for PG8MAA024070ABJA Gas Furnace

The flame sensor in your Carrier PG8MAA024070ABJA confirms that the burners actually lit before the control board allows gas to keep flowing. It works by flame rectification — passing a small microamp current through the live flame — so the board can instantly cut the gas valve if the flame goes out. As the rod oxidizes or cracks, that signal weakens and you'll notice the furnace lighting for just a few seconds before shutting back down. This short-cycle repeats until the board locks out, leaving you with no heat and, usually, a flashing diagnostic code at the control board. This is a single-rod silicon-coated steel flame sensor with a high-temperature porcelain insulator and a spade-terminal lead. When cold it reads in the megohm/open range; in operation a clean rod produces roughly 1-6 microamps of flame current, and dropout occurs once that falls below about 0.5 microamps. The OEM rod length and bend keep the tip seated in the hottest part of the burner flame. OEM matters because cheaper aftermarket sensors use thinner rods and lower-grade ceramics that oxidize and warp quickly in burner heat, sending you right back into short-cycling. The correct OEM geometry holds a strong, steady signal season after season. Install difficulty: 2 of 5. Tools: 1/4" nut driver, fine emery cloth or steel wool for cleaning, and a multimeter on the microamp scale to confirm flame current after install. #1 safety warning: shut off the gas supply and kill power at the furnace disconnect before removing the sensor — never work on the burner assembly with gas live. 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.

Compatibility

This part is compatible with Carrier model PG8MAA024070ABJA. Always verify the part number against your unit's data plate before ordering.

Why Choose OEM?

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.

Shipping & Returns

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.