OEM Carrier Flame Sensor for PG9MAA036040ABKA 90% Gas Furnace

The flame sensor in your Carrier PG9MAA036040ABKA furnace is a single metal rod that sits in the burner flame and confirms to the control board that the burners actually lit. It works by flame rectification: the flame conducts a tiny DC microamp current through the rod, and if the board doesn't see that current within a few seconds of ignition it shuts the gas off for safety. As the rod accumulates a thin oxide/silica coating over time, that microamp signal drops. The classic symptom is a furnace that lights for 3–7 seconds and then shuts off, repeating two or three times before locking out — no sustained heat, the blower cycling on and off, and an ignition-lockout code flashing on the board. Specs: this is a stainless-steel/Kanthal sensing rod with a ceramic insulator. A healthy sensor reads a flame-current signal in roughly the 1–6 microamp range (measured in series with a meter set to DC microamps); below about 0.5–1 µA the board drops out. OEM rod geometry and alloy are matched to sit at the correct depth and angle in this burner. OEM matters because aftermarket rods often use thinner or different alloy and imprecise positioning, so they read a weaker, less stable flame current, coat faster, and cause exactly the nuisance lockouts you're trying to fix. A correct OEM sensor restores a strong, steady signal and reliable ignition. Install difficulty: 2 of 5. Tools: 1/4" nut driver, optionally a multimeter (DC microamps) to verify flame current, and fine emery cloth if you choose to clean rather than replace. #1 safety warning: turn off both the gas supply and the furnace power before removing the sensor, and never bend the rod toward the burner. 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 PG9MAA036040ABKA. 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.