OEM Carrier Flame Sensor for PG8JAA036070AAJA Gas Furnace Unit

The flame sensor is a single metal rod mounted in the burner assembly of your Carrier PG8JAA036070AAJA gas furnace. It uses flame rectification to confirm the burners have actually lit, sending a tiny microamp signal back to the control board. When that signal disappears, the board closes the gas valve within seconds as a safety measure. As the rod accumulates a thin oxide and carbon coating, the signal weakens, and the symptom homeowners notice most is short-cycling: the furnace lights, runs for only 3 to 7 seconds, then shuts off and blows cold air, often repeating several times before locking out entirely. This sensor uses a high-temperature stainless/Kanthal rod rated for continuous flame exposure. A healthy unit produces a flame-rectification current of roughly 2 to 6 microamps DC; anything under about 0.5 µA will trip a flame-loss fault. You can verify it with a multimeter set to DC microamps, placed in series with the sensor wire. OEM matters here because the rod length, bend angle, and ceramic insulator are matched to this burner's flame envelope. A generic rod sitting even 1/4 inch out of the flame reads a weak signal and reproduces the exact short-cycling fault you are trying to fix. OEM ceramic insulators also hold their dielectric integrity at burner temperatures where cheaper insulators crack and ground out. Install difficulty: 1/5. Tools: 1/4-inch nut driver, fine emery cloth, multimeter. It mounts with a single screw and one spade connector. #1 safety warning: turn off the gas and the 24V power at the furnace switch before reaching into the burner compartment. 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 PG8JAA036070AAJA. 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.