OEM Carrier 90° Flame Sensor (48GS400192) for Model PY3PNA048130AB

This OEM flame sensor is the factory-specified replacement for the Carrier PY3PNA048130AB gas furnace. The flame sensor — also called a flame rod — uses ionization/rectification to verify that a burner flame is present after ignition. When the sensor detects a valid flame, it sends a small DC microamp signal to the control board to keep the gas valve open. A failed or heavily oxidized sensor cannot produce that signal, causing the board to close the valve as a safety measure. The telltale symptom: your furnace lights, runs for 5–8 seconds, then shuts off and locks out — often repeating 2–3 times before displaying a fault code.

• OEM Part Number: 48GS400192 | 90-degree mounting bracket | Approximate rod dimensions: 1.6″ L × 4.9″ H × 1.75″ W | Factory-matched signal tolerance for the PY3PNA048130AB control board
• OEM vs Generic: This is a genuine Carrier OEM part — not an aftermarket imitation. OEM sensors are calibrated to the exact microamp threshold your control board expects, reducing nuisance lockouts caused by tolerance drift common in off-brand sensors.
• Install Difficulty: 2/5 — Turn off power and gas before starting. Tools needed: 1/4″ nut driver or flathead screwdriver, fine steel wool or emery cloth (to clean rod if reusing), multimeter (to verify microamp output). Disconnect the single wire lead, remove the mounting screw, swap the sensor, and reconnect. Total time: under 15 minutes for most technicians.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed for the Carrier PY3PNA048130AB gas furnace. Always cross-reference the OEM part number 48GS400192 on your existing sensor or equipment data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us before placing your order.