OEM Carrier Gas Furnace Flame Sensor for Model PG9MAA048100ADKA

The flame sensor is a simple but essential safety rod on your Carrier PG9MAA048100ADKA gas furnace. After the burners light, it uses flame rectification — a tiny microamp current passing through the flame to ground — to prove to the control board that a flame is actually present. If the board doesn't sense that current within a few seconds, it shuts the gas valve to prevent raw gas buildup. The hallmark symptom of a failing or dirty flame sensor is short-cycling: the furnace lights, runs for 3 to 7 seconds, then shuts down and tries again, repeating until it locks out with no heat. A sensor coated in oxide or carbon, or one that's cracked, can't pass enough current to satisfy the board. This is a single-rod sensor with a high-temperature ceramic insulator and a stainless or Kanthal sensing wire. A healthy circuit reads roughly 1–6 microamps of flame current on a meter set to DC microamps; readings below ~1 µA cause dropout. Match the rod length and mounting bracket to the original — verify against your data plate before ordering. A genuine OEM sensor uses the correct alloy and rod geometry so it sits properly in the flame and sustains a stable microamp signal. Cheaper aftermarket rods use lower-grade wire that oxidizes faster and inferior insulators that develop ground faults, leading to repeat short-cycling within a season. Install difficulty: 1 of 5. Tools needed: 1/4" nut driver, fine emery cloth or steel wool, and a multimeter for microamp testing. #1 safety warning: turn off the gas supply and the 115V breaker before removing the sensor from the burner assembly. 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 PG9MAA048100ADKA. 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.