Lennox 12M55 Inducer Assembly THPU32HP7Y while specific pulse patterns identify

while specific pulse patterns identify airflow failures (1 flash)

allowing for installation in any orientation

The "R" and "L" indicators on the housing denote the clockwise or counter-clockwise fail-safe rotation

Verify the 120V input to the control module and check the diagnostic LED

Use a multimeter to check for continuity across the terminals when the furnace is cool

Lennox 12M55 Inducer Assembly THPU32HP7Y while specific pulse patterns identifyThe Lennox 12M55 Inducer Assembly is a critical OEM replacement part designed for high efficiency thermal performance in Lennox residential furnaces. This unit, also identified as the Lennox 12M5501, features a Fasco motor rated at 1 25 HP, operating at 208 230V and 3200 RPM. Engineered for durability, the draft inducer blower utilizes a robust metal housing and a steel wheel to facilitate precise flue gas exhaustion, ensuring the pressure switch