Lennox 72W34 Gas Valve 321702-401 When looking at the shaft

When looking at the shaft end of the motor

it is industry best practice to install a new capacitor when replacing the 70021633 to prevent premature winding failure and ensure proper starting torque

This ECM blower motor (Electronically Commutated Motor) features a 16-pin communication input

For best performance

Lennox 72W34 Gas Valve 321702-401 When looking at the shaftLennox 72W34 is a modulating natural gas valve designed for use in compatible Lennox heating systems, including furnaces and commercial HVAC equipment. It regulates gas flow to the burner assembly, allowing precise modulation based on heating demand for stable combustion and efficient system performance. This modulating gas valve is commonly used as a replacement component when the original valve becomes faulty, leading to improper flame control,