OEM Carrier Gas Furnace Flame Sensor for PG8MAA048070AAJA Unit

The flame sensor verifies that your Carrier PG8MAA048070AAJA furnace's burners have truly ignited before the control board keeps the gas valve open. This slender rod sits directly in the burner flame and relies on flame rectification — the flame conducts a small DC current, usually 1 to 6 microamps, back to the board. Lose that current and the board shuts the gas valve within seconds as a safety measure. The classic failure pattern is a furnace that lights, burns for three to five seconds, then drops out and re-tries over and over (short-cycling), eventually locking out and leaving the house cold. A sooty or oxidized rod is almost always the culprit. Built to Carrier's exact specification for this furnace, this OEM sensor uses a high-temperature alloy rod and ceramic insulator with the correct length and mounting bend, so the tip sits in the hottest part of the flame and returns a strong, stable microamp signal. Why OEM matters: generic flame rods are commonly the wrong length or made of lower-grade steel that oxidizes fast. Positioned slightly out of the flame or coated in oxide, the rod drops below the board's microamp threshold and triggers nuisance lockouts — sometimes within weeks. Installation difficulty: 2 of 5. Tools: a 1/4-inch nut driver, fine emery cloth to clean the rod, and a multimeter that reads DC microamps to confirm a healthy signal. Most important safety step: shut off the gas supply and kill power at the furnace disconnect 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.

Compatibility

This part is compatible with Carrier model PG8MAA048070AAJA. 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.