OEM Carrier Gas Furnace Flame Sensor for Model PG92SBS30040AAAA

The flame sensor is the safety device that proves your Carrier PG92SBS30040AAAA furnace actually lit. Once the burners ignite, this thin metal rod sits in the flame and generates a tiny microamp DC current that tells the control board 'flame present.' When the rod gets coated in silica/oxide buildup or corrodes, that signal drops below threshold and the board shuts the gas valve within seconds as a safety response. The classic symptom is short-cycling: the furnace lights, runs 3–5 seconds, then shuts off — repeating several times before locking out with no heat. You may also hear the burners ignite and immediately extinguish with a soft 'whump.' Specs: this is a single-rod rectification flame sensor with a high-temperature porcelain insulator and a keyed spade or molex connector matched to the PG92 board. A healthy sensor passes roughly 1–6 microamps DC in flame; readings below ~0.5 µA indicate a dirty or failed rod. The OEM rod length and bend angle are critical — they position the tip correctly in the flame envelope. Why OEM matters: aftermarket sensors often use thinner or differently-alloyed rods that oxidize faster and sit at the wrong depth, leading to weak rectification and repeat short-cycling even when 'new.' The OEM sensor restores the exact microamp signal your board expects. Install difficulty: 1 of 5 — one of the easiest furnace repairs. Tools: 1/4" nut driver and a multimeter set to DC microamps to verify. SAFETY: turn off gas and kill power at the breaker before removing the sensor; the rod and surrounding manifold can be extremely hot after a run cycle. Ships same business day from our stocked warehouse on orders 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 PG92SBS30040AAAA. 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.