the valve will typically default to one mode (mostly heating for many residential brands) if the coil is de-energized

this regulator provides excellent control from full flow down to pilot stages

maintaining accurate alignment for modulating or two-position damper control

providing reliable starting torque and high volumetric efficiency

It is not designed for air conditioning or independent fan control applications

Lochinvar & A.O. Smith 100304988 Gasket 321042-401 the valve will typically defaultEnsure a high integrity seal for your precision combustion equipment with the Lochinvar & A. O. Smith 100304988 Gasket. Specifically designed as a flame sensor gasket, this OEM replacement part maintains the airtight boundary necessary for accurate flame rectification and consistent signal transmission to the control board. For any service technician or mechanical contractor, replacing the gasket during annual maintenance or whenever the sensor is