OEM Carrier Flame Sensor 48GS400192 for Model PY3GNA048090AB

This OEM flame sensor (part number 48GS400192) is the factory-specified replacement for the Carrier PY3GNA048090AB packaged gas/electric unit. The flame sensor is a critical safety component — its flame rod detects the presence of a burner flame by passing a small electrical current through it. If the control board does not receive confirmation of flame within a few seconds of gas valve opening, it will shut down the burner as a safety precaution. A failed or contaminated flame sensor is one of the most common causes of a furnace or packaged unit that lights briefly and then shuts off after just 5–8 seconds, often triggering a lockout fault code.

• Specs: OEM part number 48GS400192 | Factory flame rod assembly | Direct drop-in fit for Carrier PY3GNA048090AB | Engineered to meet original factory electrical resistance specifications
• OEM vs Generic: OEM flame sensors are manufactured to exact factory tolerances for rod geometry and ceramic insulation quality. Generic sensors may exhibit higher resistance readings, causing nuisance shutdowns and repeat service calls even after replacement.
• Install Difficulty: 2/5 — Shut off gas and electrical power before servicing. Tools needed: 1/4" hex driver or nut driver, needle-nose pliers, and a multimeter (to verify microamp signal after install). Before removing, photograph the wire connector orientation. Clean the burner area of any debris before reinstalling.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier PY3GNA048090AB packaged gas/electric unit. Always verify your existing part number on the sensor body or your unit's parts list before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.