Carrier LH33WZ007 Flame Sensor

Description

Carrier LH33WZ007 Flame Sensor Overview

The Carrier LH33WZ007 is an OEM replacement flame sensor designed to deliver dependable furnace performance and safe burner operation. The flame sensor plays a critical role in your heating system’s safety circuit — it detects the presence of a burner flame and signals the control board to keep the gas valve open. A faulty or worn flame sensor is one of the most common causes of furnace short-cycling and no-heat calls, making this a go-to replacement part for HVAC technicians and service professionals.

Key Features

• OEM Carrier replacement flame sensor — engineered to factory specifications
• Ensures accurate flame detection for safe furnace operation
• Helps prevent furnace short-cycling caused by a degraded or coated sensor rod
• Direct replacement for compatible Carrier furnace models
• Supports reliable ignition sequencing and burner lockout protection
• Durable construction for long service life in residential and light commercial applications

Application

The LH33WZ007 flame sensor is intended for use in compatible Carrier gas furnaces. Always verify compatibility with the specific furnace model number before installation. Refer to the equipment’s service manual for proper installation procedures and torque specifications.

Why Replace Your Flame Sensor?

Over time, flame sensor rods accumulate oxidation and residue that insulate the rod and reduce its ability to conduct the microamp signal needed to verify flame presence. This causes the control board to shut off the gas valve, resulting in repeated ignition attempts and eventual lockout. Replacing the flame sensor with a genuine Carrier part restores proper system function quickly and cost-effectively.