OEM Carrier Flame Sensor Replacement for Furnace PG9MAA060140AAKA

The flame sensor is the safety device that confirms your Carrier PG9MAA furnace has actually established a flame. Mounted in the burner assembly, it works by flame rectification — a healthy flame conducts a tiny DC microamp current that the control board reads to verify burn. As long as that signal is present, the board holds the gas valve open. When the rod becomes coated with silica or carbon (the normal failure mode), the signal weakens until the board can no longer 'see' the flame. The classic symptom is short-cycling on ignition: the burners light, run 3–7 seconds, then shut off and retry. After three or four failed attempts the board drops into hard lockout and you get no heat, usually with an LED flashing a flame-sense fault. This is a single-rod rectifying sensor with a stainless/Kanthal probe rated for continuous burner-flame exposure (1,800°F+). A clean sensor on this furnace passes roughly 4–6 microamps DC; readings under about 1.0–1.5 µA trigger lockout. The OEM rod length and bend are sized to seat at the correct depth in the flame envelope for this burner's spacing. OEM matters here because aftermarket sensors often use a thinner rod or different alloy that oxidizes faster, plus a bracket that positions the tip slightly off the flame. That produces a marginal signal that reads fine on day one but falls below threshold within a season. OEM geometry guarantees correct flame immersion and stable microamp output. Install difficulty: 2/5. Tools: 1/4" nut driver, fine emery cloth, and a multimeter with microamp scale. #1 safety warning: shut off the gas and kill furnace power at the disconnect 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 PG9MAA060140AAKA. 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.