OEM Carrier 90° Flame Sensor 48GS400192 for Model PY1PPB042090AAAA

This OEM flame sensor (part #48GS400192) is the factory-specified replacement for the Carrier PY1PPB042090AAAA gas furnace. The flame sensor is a critical safety component mounted in the burner assembly — it uses electrical rectification to confirm the presence of flame during each heating cycle. When the sensor rod becomes coated with oxidation or carbon buildup, its microamp signal weakens, causing the control board to cut gas flow as a safety lockout. The telltale symptom: your furnace fires up, runs for 5 to 8 seconds, then shuts off — repeating the cycle until it locks out entirely.

• Specs: 90° bend configuration | Includes mounting bracket | OEM part number 48GS400192 | Manufacturer: Carrier | Dimensions approx. 4.9" L × 1.75" H × 1.6" W
• OEM vs Generic: This is a genuine Carrier OEM part, manufactured to exact factory tolerances for microamp output and rod geometry. Aftermarket sensors can produce inconsistent signals, triggering false lockouts or nuisance shutdowns.
• Install Difficulty: 2/5 — Power down and shut off the gas supply before beginning. Tools needed: 1/4" nut driver, needle-nose pliers. Disconnect the single wire connector, remove the mounting screw, swap the sensor, and reconnect. Clear any lockout codes on the control board after installation.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY1PPB042090AAAA gas furnace. Always confirm the OEM part number printed on your existing sensor before ordering. Have a fitment question? Our HVAC parts team verifies compatibility before you buy — reach out before placing your order. In stock and ready to ship today.