When equipped with the 12A04 vent limiter

0 microamp signal consistently throughout the heating season

Whether you are addressing a failing indoor fan motor or performing a preventative system upgrade

whereas the "F" series utilized a lower-rated insulation class

as the new model has a 5-foot capillary

York S1-031-02985-000 Control Board 319825-402 When equipped with the 12A04The York S1 031 02985 000 Control Board is a critical OEM replacement component designed for AHE series one piece air handlers and related residential cooling equipment. This circuit board serves as the primary processing unit, managing blower motor speeds, fan cycling, and multi stage temperature regulation. Engineered for seamless integration with standard ECM motors, it ensures high performance communication between thermostats and system