OEM Carrier Flame Sensor for PG8UAA036045ADJA Gas Furnace

The flame sensor confirms to your furnace's control board that the burners actually lit. Seated directly in the burner flame, it uses flame rectification to pass a small microamp DC current; the board reads that current and keeps the gas valve open only while a real flame is proven. As the rod accumulates oxide and carbon, the current weakens and the board shuts the gas off within seconds for safety. The telltale homeowner symptom is short-cycling: the furnace ignites, burns for a few seconds, then shuts down, often retrying two or three times before locking out into a no-heat condition. It's the single most common cause of intermittent furnace dropouts. This is a single-rod rectification sensor built to Carrier's exact rod length, wire gauge, and bracket geometry so it sits at the proper depth in the flame of your PG8UAA cabinet. A clean rod typically reads 2-6 microamps DC, comfortably above the board's roughly 0.5 microamp dropout threshold. The high-temperature ceramic insulator withstands continuous burner exposure. Generic sensors often use thinner rods or short insulators that position the tip at the wrong flame depth, yielding a weak, unstable signal and nuisance lockouts even on an otherwise healthy furnace. An OEM rod restores the factory flame-current margin. Install difficulty: 1 of 5. Tools: 1/4" nut driver, fine emery cloth, and a multimeter set to microamps DC to verify flame current. SAFETY: shut off both the breaker and the gas supply before removing the sensor. Reseat it fully and confirm a solid ground path. 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 PG8UAA036045ADJA. 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.