OEM Carrier Flame Sensor (48GS400192) for Model PY3PNA024040AB

This is the genuine OEM Carrier flame sensor, part number 48GS400192, factory-specified for the Carrier PY3PNA024040AB gas furnace. The flame sensor is a critical safety component — it uses ionization/rectification technology to detect the presence of a burner flame during each heating cycle. When the control board calls for heat and the igniter lights the burner, the flame sensor passes a small electrical current through the flame to confirm ignition. If the sensor is coated with oxidation or has failed entirely, it cannot confirm the flame, and the control board will shut off gas flow within 5–8 seconds as a safety measure — causing the furnace to lock out after 3 attempts.

• Specs: 90-degree mounting angle | Includes mounting bracket | Compact rod design (~4.9" L × 1.75" H) | Compatible with 24V control circuits
• OEM vs Generic: This is a genuine Carrier OEM part, manufactured to exact factory tolerances. Generic sensors can have imprecise rod geometry and inferior alloy coatings that degrade faster, leading to repeat service calls.
• Install Difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" hex driver or nut driver, needle-nose pliers. Disconnect the single wire lead, remove the mounting screw, swap the sensor, and reconnect. Always verify the sensor rod is positioned correctly in the burner flame envelope.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PNA024040AB gas furnace. Verify your existing sensor's mounting angle (90°) and bracket style against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence and get back to heat fast.