The Lennox 71W29 Gasket is a critical OEM replacement part engineered specifically for high-efficiency gas furnaces

ensuring long-term field reliability in demanding outdoor conditions

making it the precise choice for mid-sized residential split systems or packaged units

As a bi-flow valve

A dark LED typically indicates a loss of 24VAC input from the air handler or furnace control board

Browning B140 Belt 320788-704 The Lennox 71W29 Gasket isThe Browning B140 Belt is a heavy duty classic wrap V belt engineered for demanding HVACR and industrial drive applications. Featuring a 143" outside diameter and a standard B section profile, this Browning Super Gripbelt utilizes high performance synthetic polymers to ensure superior oil and heat resistance. The 21 32" top width and 13 32" thickness provide the stability required for high torque transmissions while minimizing vibration in large air