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This is the genuine OEM Carrier flame sensor (part number 48GS400192), factory-specified for the Carrier PY3PNA036060NA gas furnace. The flame sensor is a safety-critical component — its flame rod extends into the burner assembly and uses ionization/rectification to confirm an active flame during each heating cycle. When it fails or becomes coated with oxidation, the control board receives no flame-confirmation signal and shuts down gas flow within 5–8 seconds of ignition as a safety lockout, leaving your home without heat.
Compatibility: Engineered specifically for the Carrier PY3PNA036060NA gas furnace. Verify your existing part number on the sensor body or equipment data plate before ordering. Not sure it fits? Our HVAC parts team will confirm fitment before you buy — order with confidence and get back to heat fast.