OEM Carrier Flame Sensor for Model PY3PNA030040NA — Part 48GS400192

This is the genuine OEM replacement flame sensor for the Carrier PY3PNA030040NA packaged unit. The flame sensor — also called a flame rod — is a critical safety component in your unit's burner assembly. It detects the presence of an active flame and sends a microamp signal to the control board to confirm ignition. When the sensor fails or becomes coated with oxidation, the control board cannot verify combustion, causing the system to enter a safety lockout. The most common symptom is a furnace or heat section that ignites normally, burns for 5 to 8 seconds, then shuts down — repeating this cycle until lockout is triggered.

• Specs: OEM part number 48GS400192 | Factory-matched microamp output | Stainless steel flame rod | Direct drop-in replacement for Carrier PY3PNA030040NA
• OEM vs Generic: This genuine OEM sensor is manufactured to exact factory microamp tolerances. Generic sensors may produce inconsistent readings, causing nuisance lockouts or masking true ignition failures — always choose OEM for reliable diagnostics.
• Install Difficulty: 2/5 — Shut off gas and 24V control power before servicing. Tools needed: 1/4" or 5/16" nut driver, needle-nose pliers, fine steel wool or emery cloth (for rod cleaning inspection). The sensor is typically secured by a single screw with a push-on or spade connector — note wire polarity before removal.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PY3PNA030040NA packaged unit. Always verify your existing part number printed on the sensor body or your unit's wiring diagram before ordering. Our fitment specialists are available to confirm compatibility before you buy — ensuring you get the right part the first time.