OEM Carrier Gas Furnace Flame Sensor Rod for PG9MAB048100LBSA

The flame sensor is a single metal rod that confirms your Carrier PG9MAB furnace has actually lit. Once the burners ignite, the rod uses flame rectification to send a tiny microamp current back to the control board, telling it that fire is present and it is safe to keep the gas valve open. When the rod becomes coated with oxide or carbon, that signal weakens and the board shuts the gas off as a safety measure — the hallmark symptom is a furnace that lights for a few seconds, then shuts down and short-cycles repeatedly, often blowing cool air and locking out after several failed tries. This is a single-rod flame-rectification sensor with a porcelain insulator and a high-temperature stainless/Kanthal sensing element. It reads an open circuit to ground (it is not a heater) and should produce a flame-sense current in the 1–6 microamp range when the burner is lit; readings below roughly 1.5 µA usually trigger lockout. Verify the bracket geometry and spade terminal against your data plate, as rod length and bend vary by furnace. Why OEM matters: a genuine Carrier rod uses the correct alloy and insulator rated for sustained burner-flame temperatures. Cheap generic sensors use thinner elements that oxidize and warp quickly, drifting out of the microamp window and causing repeat lockouts within a single heating season. Install difficulty: 1 of 5. Tools: 1/4" nut driver, fine emery cloth or steel wool to clean the rod, and a multimeter that reads microamps to confirm flame current. SAFETY: turn off the furnace gas shutoff and kill the breaker before removing the sensor near 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 PG9MAB048100LBSA. 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.