OEM Carrier Flame Sensor 48GS400192 for Model PY3PEA048090AA

This is the genuine OEM replacement flame sensor for the Carrier PY3PEA048090AA packaged gas/electric unit. The flame sensor — also called a flame rod — is a safety-critical component that detects the presence of a burner flame by passing a small microamp current through the flame to ground. When the sensor becomes coated with oxidation or carbon buildup, or fails outright, the furnace's control board cannot confirm ignition and will cut gas flow, causing the unit to lock out. The classic symptom: the burner lights, runs for 5–8 seconds, then shuts off — often repeating 3 times before a hard lockout.

• OEM Part Number: 48GS400192 | Genuine Carrier factory replacement | Exact fit for PY3PEA048090AA
• OEM vs Generic: Genuine OEM sensors are manufactured to precise rod length, bracket geometry, and alloy spec. Off-brand sensors often produce low or inconsistent microamp readings, causing nuisance lockouts even when newly installed.
• Install Difficulty: 2/5 — Turn off gas and power before beginning. Tools needed: 1/4" nut driver, small flat-blade screwdriver, and a multimeter capable of reading microamps (µA) for post-install verification. Photograph the wire harness before disconnecting. Clean the mounting area of any carbon deposits before installing the new sensor.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Factory-specified fit for Carrier model PY3PEA048090AA packaged heating and cooling units. Always verify your existing part number on the component or equipment wiring diagram before ordering. Have a fitment question? Our HVAC parts specialists confirm compatibility before you buy — call or chat today.