OEM Carrier Flame Sensor (48GS400192) for Model PY3PNA048115AA

This OEM flame sensor is the factory-specified replacement for the Carrier PY3PNA048115AA gas furnace. The flame sensor — also called a flame rod — uses ionization/rectification technology to detect the presence of a burner flame during each heating cycle. When the furnace ignites, the flame produces a small microamp DC signal that the control board reads as proof of ignition. A failed or contaminated sensor causes the board to cut gas flow within 5–8 seconds of ignition, resulting in repeated no-heat lockouts. Cleaning may temporarily restore function, but a cracked or carbon-fouled rod requires full replacement to restore reliable operation.

• Specs: 90° mounting angle | Includes mounting bracket | OEM part number 48GS400192 | Factory-matched microamp detection range
• OEM vs Generic: This is a genuine Carrier OEM part — not an aftermarket substitute. OEM sensors are precision-calibrated to the control board's signal threshold, ensuring reliable flame detection. Generic sensors may read out of range, causing nuisance lockouts or delayed shutoff.
• Install difficulty: 2/5 — Shut off gas and power before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, fine steel wool or emery cloth (to clean rod contact). Disconnect the wire lead, remove one mounting screw, swap the sensor, and reconnect. Typical repair time: 15–20 minutes.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our warehouse.

Compatibility: Verified fit for Carrier model PY3PNA048115AA gas furnace. Always confirm the OEM part number on your existing sensor or your unit's wiring diagram before ordering. Need help verifying fitment? Our HVAC parts specialists confirm compatibility before you buy — order now and ships today!