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Flexible Differential: Internal dial offers an adjustable differential range for fine-tuning the burner cycle
As an essential HVAC replacement part
Do I need to replace the orifice separately
While it is a universal service thermostat
as long as the coil voltage and the number of poles match
Nordyne 921498 Control Board 320720-756 Flexible Differential: Internal dial offersThe Nordyne 921498 Control Board is a critical OEM replacement component engineered for high performance management of modulating furnace systems and packaged units. Specifically designed for the G7 series furnace, this integrated furnace control manages critical sequencing including induction, ignition timing, and blower motor speed regulation. It features a 24 VAC control circuit protected by an onboard 3A fuse to prevent damage from low voltage
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