This board is engineered to meet specific resistance and amperage ratings required for maintaining the integrity of the furnace control circuit

Fine debris can lodge between the disc and seat

ideal for high-efficiency burners

it supports a 70°C ambient temperature rating and features Class F insulation

this diaphragm ensures an airtight seal

Nordyne 664228R Manifold 321894-706 This board is engineered toAs a technician, you know that maintaining proper gas manifold pressure and distribution is non negotiable for combustion stability. The Nordyne 664228R Manifold is a critical OEM component engineered specifically for gas fired furnace applications requiring precise fuel delivery to the burner cluster. This burner tube manifold is manufactured to strict tolerances to ensure a balanced flow across all ports, directly impacting the heating efficiency