As a direct-acting pneumatic sensor

compatible with the KSACN0401AAA wired controller and 24V interface for integration with smart thermostats

the MHK2 will override local commands if a schedule is active or if the system is locked through a centralized controller

While some Honeywell VR series valves allow for conversion

York S1-7975-3901/A Burner Sensor Wire 318973-401 As a direct-acting pneumatic sensorThe York S1 7975 3901 A Burner Sensor Wire is a critical OEM replacement part engineered for high accuracy flame rectification signal transmission. As a veteran technician, you know that a degraded sensor wire often leads to intermittent ignition failure or short cycling, as the control board fails to receive the microamp signal required to keep the gas valve energized. This burner sensor wire is specifically designed for York DGAA056BDTA furnace