Lennox 621344-01 Blower Control Board Kit

The Lennox 621344-01 Blower Control Board Kit is an OEM replacement control board designed for select Lennox gas furnaces. This board controls blower motor operation during heating and cooling cycles and helps ensure proper system sequencing and operation.

Product Specifications

• Part Number: 621344-01
• Manufacturer: Lennox
• Product Type: Blower Control Board Kit
• Condition: New OEM Replacement
• Application: Gas Furnace Blower Control

Compatible Furnace Series

Compatible with select Lennox:

• G20 Series
• G20R Series
• G23 Series
• G26 Series
• O23 Series
• OF23 Series
• OHR23 Series

Always verify your furnace model and existing part number before ordering.

Common Symptoms of a Failed Blower Control Board

A faulty blower control board can cause a variety of furnace operation problems, including:

• Blower motor does not start
• Blower runs continuously
• Furnace will not complete a heating cycle
• No power being sent to the blower motor
• Intermittent furnace operation
• Burnt or damaged components on the control board
• No response to thermostat calls
• Repeated system lockouts
• Flashing diagnostic codes related to blower operation

Package Includes

• 1 × Lennox 621344-01 Blower Control Board Kit

Important Information

• Genuine OEM replacement part
• Designed for use with compatible Lennox furnace models
• Professional installation is recommended
• Disconnect electrical power before servicing any HVAC equipment