OEM Carrier Flame Sensor 48GS400192 for Model PY3PPA030040NA

This is the genuine OEM Carrier flame sensor (part #48GS400192) — the factory-specified replacement for the Carrier PY3PPA030040NA gas furnace. The flame sensor is a critical safety component: after the igniter fires the burner, the sensor's rod detects the presence of flame via electrical rectification/ionization and sends a confirming signal back to the control board. When it fails or becomes coated with oxidation, the board receives no flame signal and shuts off the gas valve within 5–8 seconds of ignition — resulting in repeated short-cycle lockouts and a no-heat call.

• Specs: 90-degree flame sensor with mounting bracket | Approx. rod length 1.6" | Overall dimensions: 4.9" × 1.75" | OEM part number 48GS400192 | Genuine Carrier replacement
• OEM vs Generic: This is the factory OEM sensor, matched to Carrier's exact rectification current thresholds. Aftermarket sensors with loose tolerances can produce intermittent nuisance lockouts or fail prematurely in high-cycle commercial applications.
• Install difficulty: 1/5 — One of the easiest furnace repairs. Tools needed: 1/4" hex driver, needle-nose pliers. Always shut off gas and 120V power before servicing. Lightly abrade the sensor rod with fine steel wool if reusing to remove oxidation coating.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PPA030040NA packaged gas furnace. Verify OEM part number 48GS400192 on your unit's parts label or wiring diagram before ordering. Need fitment help? Our HVAC parts specialists confirm compatibility before you buy — order with confidence and get back to heat fast.