OEM Carrier Flame Sensor for PG8JAA048110ACJA Packaged Gas Furnace

The flame sensor is a thin metal rod that sits directly in the burner flame and confirms ignition using flame rectification — a tiny microamp current passes through the flame to ground, telling the control board the burners actually lit. When the rod becomes coated with oxide or carbon, or cracks at the ceramic base, the board can no longer 'see' the flame and closes the gas valve within seconds as a safety lockout. The classic homeowner symptom is short-cycling: the igniter glows, the burners light for 3 to 7 seconds, then shut off, often repeating several times before the furnace locks out and leaves the house cold. This is a single-rod flame rectification sensor with a high-temperature alloy probe and ceramic insulator base, rated for continuous burner-flame exposure. A healthy sensor produces a flame current of roughly 1 to 6 microamps DC; once the signal drops below about 0.5 µA the board drops out. It mounts with a single hex screw and a spade terminal lead. OEM matters here because the rod alloy and insulator resistance are matched to Carrier's specific board sensitivity threshold. Generic sensors often use a different alloy or thinner insulator that builds oxide faster or leaks current to ground when hot, producing intermittent flame loss that is maddening to diagnose. A genuine part holds a stable microamp signal across its service life. Install difficulty: 2/5. Tools needed: 1/4" nut driver, a multimeter capable of reading DC microamps, and fine emery cloth. #1 safety warning: shut off gas and kill 120V power at the furnace switch 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 PG8JAA048110ACJA. 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.