Carrier LH33WZ017 Flame Sensor

Description

The Carrier LH33WZ017 is an OEM replacement flame sensor designed to deliver dependable flame detection in Carrier furnace systems. The flame sensor plays a critical safety role in your heating system — it confirms the presence of a burner flame and signals the furnace control board to allow gas flow to continue. If the sensor fails or becomes coated with oxidation, the furnace may shut down prematurely or fail to ignite, making timely replacement essential for uninterrupted home comfort.

Key Features

• OEM Carrier replacement part — engineered to exact factory specifications
• Ensures accurate flame rectification signal to the furnace control board
• Helps prevent nuisance lockouts caused by a weak or degraded sensor
• Direct drop-in replacement for compatible Carrier furnace models
• Supports safe, reliable furnace operation throughout the heating season

Application

• Compatible with select Carrier gas furnace models — verify compatibility using your furnace model number before ordering
• Ideal for HVAC technicians performing routine maintenance, seasonal tune-ups, or fault-code diagnostics

Why Replace Your Flame Sensor?

Over time, flame sensors accumulate a thin layer of oxidation on the sensing rod, which insulates it and reduces its ability to pass the microamp signal needed to confirm flame presence. A dirty or failed flame sensor is one of the most common causes of furnace short-cycling and no-heat service calls. Replacing the Carrier LH33WZ017 flame sensor restores proper furnace operation quickly and cost-effectively.