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With a factory-preset 5% deadband (adjustable to 3%) and field-tunable input span and start point potentiometers
Precise Pressure Regulation: Maintains a steady 4" WC full pressure to optimize combustion and energy consumption
The Nordyne 903400 Replacement Kit is a field-proven solution for restoring critical ignition and control functions in a wide range of gas-fired HVAC systems
providing a robust interface for hydronic heating systems
Always verify the fan blade diameter
Nordyne 904768 Door Set 321702-401 With a factory-preset 5% deadbandThe Nordyne 904768 Door Set is a precision engineered replacement panel assembly designed specifically for M7RL and M7TL series gas furnaces. This OEM kit ensures a proper airtight seal across the heat exchanger and blower compartments, which is critical for maintaining correct static pressure and furnace efficiency. Constructed from heavy gauge galvanized steel with a high durability finish, the upper and lower door set provides necessary protection
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