OEM Carrier Flame Sensor (48GS400192) for Model PY3PNA042060NA

This is the genuine OEM Carrier flame sensor, part number 48GS400192, factory-specified for the Carrier PY3PNA042060NA gas furnace. The flame sensor — also called a flame rod — is a critical safety component mounted in the burner assembly. When the burner fires, the sensor uses an ionization/rectification technique to detect the presence of flame and sends a microamp signal to the control board confirming ignition. If the sensor is coated with oxidation or has failed, the control board receives no signal, assumes a failed ignition, and shuts off the gas valve — typically within 5 to 8 seconds of startup. The result: a furnace that lights briefly, then locks out on a no-flame fault code.

• Part Number: 48GS400192 | OEM Carrier genuine replacement | 90-degree mounting bracket included
• OEM vs Generic: The OEM sensor is manufactured to exact factory microamp-detection tolerances. Aftermarket sensors may trigger nuisance shutdowns or fail to detect marginal flames that a properly calibrated OEM rod would catch — a safety risk in any gas appliance.
• Install Difficulty: 2/5 — Straightforward swap requiring a 1/4" hex driver and needle-nose pliers. Always shut off gas supply and 24V power before beginning. Lightly sand the sensor rod with fine steel wool before reinstalling if trying to clean the original; replace if microamp reading remains below 1.5 µA.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse.

Compatibility: Engineered as a direct factory replacement for the Carrier PY3PNA042060NA gas furnace. Verify your model and serial number on the unit's data plate before ordering. Not sure it fits? Our HVAC parts team confirms fitment before you buy — reach out before placing your order.