OEM Carrier Flame Sensor (48GS400192) for Model PY1PNB030040AAAA

The Carrier 48GS400192 is the factory-specified OEM flame sensor for the PY1PNB030040AAAA gas furnace. This 90-degree flame rod uses ionization/rectification technology to confirm burner ignition during every heating cycle. When the burner fires, the flame sensor generates a small DC microamp signal that tells the control board the flame is present and safe to keep the gas valve open. A failed or contaminated sensor causes the furnace to light briefly and then shut down within 5–8 seconds — leaving your home without heat and triggering repeated ignition lockouts.

• Part Specs: OEM part number 48GS400192 | 90-degree mounting bracket included | Flame rod length approx. 1.6 in. | Overall dimensions approx. 4.9 in. × 1.75 in. | Factory-matched microamp output tolerance
• OEM vs Generic: This is a genuine Carrier OEM component — not an aftermarket substitute. OEM sensors are calibrated to the exact microamp threshold the Carrier control board expects, reducing nuisance lockouts caused by off-spec generic rods.
• Install Difficulty: 2/5 — One mounting screw and one spade connector. Tools needed: 1/4 in. or 5/16 in. nut driver, fine steel wool or emery cloth (to clean rod if reusing), multimeter (to verify microamp draw post-install). Always shut off power and gas before servicing. Clean the rod surface if carbon-coated before condemning the part.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse — order by 3 PM local time.

Compatibility: Designed for the Carrier PY1PNB030040AAAA gas furnace. Verify your existing sensor's bracket angle (90°) and connector type against your unit's data plate before ordering. If you're unsure of fitment, our team confirms compatibility before you buy — no guesswork, no returns.