OEM Carrier Flame Sensor for PG8JAA024045AAJA Packaged Gas Furnace

The flame sensor in your Carrier PG8JAA024045AAJA confirms a real flame is present after the burners light, using flame rectification — a small microamp DC current that only passes when flame connects the sensor rod to the burner ground. When the rod oxidizes or carbons over, the signal falls below the board's threshold and the gas valve closes for safety. You'll see the furnace fire for a few seconds and then cut out, short-cycling on repeat until it hits a hard lockout and stops producing heat entirely. This is a single stainless/Kanthal rod mounted on a ceramic insulator with a spade-terminal lead. A clean, properly positioned sensor reads a steady flame current of about 2–6 microamps; readings under roughly 0.5 µA trigger dropout. OEM Carrier rods are the correct length with the right ceramic standoff so the tip sits in the hottest, most ionized part of the flame. Why OEM matters: generic flame rods often use thinner rod material and lower-grade ceramic that crack, foul, or shift position, so the board never sees a stable rectified signal — and you're back to the same intermittent no-heat short-cycling that brought you here. Install difficulty: 1/5. Tools: 1/4" or 5/16" nut driver, fine emery cloth or steel wool for cleaning, and a multimeter that reads microamps in series with the sensor lead. #1 safety warning: shut off the gas at the manual valve and cut power at the breaker before removing the sensor — never work near live burners, and avoid bending the new rod when seating it. 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 PG8JAA024045AAJA. 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.