While it functions as a standard control relay

an open circuit or infinite ohms indicates the coil is defective and requires replacement

Does it include the vent damper harness

Industrial Compliance: Fully meets ASTMB Standard #483

Can I use this to replace a 1/3 HP motor

Lochinvar & A.O. Smith 100233597 Gasket 30067439-890 While it functions as aThe Lochinvar & A. O. Smith 100233597 Gasket is a critical high temperature seal designed specifically for the flue exhaust system on heavy duty commercial boilers and water heaters. Engineered to withstand intense thermal cycling, this EPDM flue gasket ensures a gas tight seal between the heat exchanger and the venting assembly, preventing hazardous combustion byproducts from escaping into the mechanical room. This component is a direct replacement