LH680014 LH680534 Furnace Flame Sensor

Key Features

• Monitors the burner flame to ensure safe furnace operation
• Signals the furnace control board to shut off the gas valve if a flame is not detected
• Durable construction for long service life
• Two-piece design for installation flexibility; connect pieces prior to installation

Replaces / Cross-Reference Part Numbers

• LH680534 (direct replacement for LH680014)
• LH680014
• LH33WZ511
• LH33WZ515
• LH680012
• PFS014

Compatibility & Fitment

• Fits specific furnace models from brands including Carrier, Bryant, Payne, and Day & Night
• Commonly used in models such as: 340MAV, 345MAV, 350MAV, 355MAV, 373LAV, 58MXA, and others

When to Replace

• Furnace burners ignite but shut off after a few seconds
• Furnace fails to ignite, resulting in a system lockout
• Visible corrosion or carbon buildup on the sensor rod that cannot be cleaned
• Diagnostic error codes indicate a flame sensor fault

Installation Tips

• Disconnect electrical power and shut off the gas supply to the furnace before servicing
• Handle the new sensor by its ceramic base to avoid contaminating the metal rod
• Ensure the two pieces of the sensor are securely connected before installation
• Confirm the sensor is properly positioned in the path of the pilot or main burner flame