OEM Carrier Flame Sensor Replacement for Model PG9MAB024040LBSA

The flame sensor is the safety component that confirms your Carrier PG9MAB024040LBSA actually lit. After the igniter glows and the gas valve opens, the sensor's metal rod sits in the burner flame and passes a tiny microamp rectified current back to the control board, proving flame is present. As the rod oxidizes and accumulates a silica/carbon coating, that signal drops below threshold and the board can no longer 'see' the fire — so it closes the gas valve for safety. The classic symptom is a furnace that lights for 3–7 seconds, then shuts off and re-tries, short-cycling repeatedly before locking out with little or no heat delivered. This genuine OEM flame sensor uses a high-temperature Kanthal-type rod and ceramic insulator built to Carrier's resistance and flame-rectification spec, with the correct rod length, bend, and mounting bracket so it sits precisely in the flame path. A properly positioned OEM rod typically reads a healthy 2–6 microamps of flame current. Why OEM matters here: rod geometry and alloy directly control the flame-current signal. Generic sensors with the wrong length, bend, or lower-grade alloy may read weak microamps even on a good flame, oxidize faster, and bring back the same short-cycling within months. OEM keeps the signal strong and stable. Install difficulty: 1/5 — one of the easiest furnace repairs. Tools: 1/4" nut driver and fine emery cloth or a Scotch-Brite pad. SAFETY: turn off both electrical power at the breaker AND the gas supply before reaching into the burner area; the sensor and surrounding metal can be scorching hot. 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 PG9MAB024040LBSA. 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.